Individual data unit and methods and systems for enhancing the security of user data

ABSTRACT

An individual data unit for enhancing the security of a user data record is provided that includes a processor and a memory configured to store data. The individual data unit is associated with a network and the memory is in communication with the processor. The memory has instructions stored thereon which, when read and executed by the processor cause the individual data unit to perform basic operations only. The basic operations include communicating securely with computing devices, computer systems, and a central user data server. Moreover, the basic operations include receiving a user data record, storing the user data record, retrieving the user data record, and transmitting the user data record. The individual data unit can be located in a geographic location associated with the user which can be different than the geographic locations of the computer systems and the central user data server.

CROSS REFERENCE TO RELATED APPLICATIONS

This is a continuation application of U.S. patent application Ser. No.16/686,101, filed Nov. 16, 2019, which is a continuation application ofU.S. patent application Ser. No. 16/408,493, filed May 10, 2019, nowU.S. Pat. No. 10,572,683, issued Feb. 25, 2020, which claims the benefitof the priority of U.S. Provisional Patent Application Nos. 62/670,831and 62/686,041, filed May 13, 2018 and Jun. 17, 2018, respectively, theentire disclosures of which are incorporated herein by reference.

BACKGROUND OF THE INVENTION

This invention relates generally to enhancing the security of user datastored in computer systems, and more particularly, to an individual dataunit and systems including individual data units such that the securityof user data stored in such systems is enhanced.

Different types of entities collect information regarding theircustomers as part of conducting business or interacting with the public.Such entities may include retailers, governmental agencies, medicalproviders, identity management system (IDMS) owners and operators, andsecure email service providers. Each different entity typically storesits collected user data on a central user data server configured tocommunicate over networks like the Internet. For example, retailers havebeen known to store credit card information and order histories forcustomers. Governmental agencies have been known to store the socialsecurity numbers and birth dates of citizens. Medical providersroutinely store sensitive health records of individuals. IDMS operatorstypically store passwords, biometric data, security questions andanswers, and other personal information of people who authenticatethemselves using the IDMS. Additionally, email systems, including thosethat are designed to be extra secure against cyber-attack, typicallystore sensitive emails associated with users in a central user dataserver.

Some entities have been known to store information regarding manymillions of different users. Such large amounts of user data coupledwith Internet access to the central user data servers has been known tocreate a target highly valued by cyber-criminals due to the amount ofdata that may be stolen in a single successful cyber-attack.

The high value of centralized targets has been known to attract wellfinanced players, including state actors and organized criminalenterprises. The high value of the data, all stored in one place, meansthat cyber-criminals can afford to mount a well-resourced attack tosteal the data, including, in some cases, brute force decryption attacksshould the data be stored in an encrypted form.

Cyber-criminals have been known to use stolen customer data for theireconomic gain. For example, cyber-criminals have been known to use avictim's data to fraudulently open new credit card accounts and tocharge purchases to the new accounts. Although the victims likely do notknow about the fraudulently opened new accounts or the purchases, manytimes the victims are liable for purchases made by the cyber-criminals.Even in situations where individual users are not financially liable forsuch criminal acts, the financial burden of such thefts is spread acrossall of society and everyone ultimately suffers some financial impact.Cyber-criminals have also been known to take over investment accountsand withdraw the funds from those accounts leaving the victims withlittle money for retirement or to pay college tuition for children.Additionally, cyber-criminals have been known to use a victims' data toset up new fraudulent social networking sites in which they pretend tobe the victim. In addition to financially damaging victims,cyber-attacks have been known to take an emotional toll on victims,cause physical symptoms like inability to concentrate, and create socialstress. People whose data is stolen are victims of a successfulcyber-attack.

To improve security against cyber-attacks, entities have been known toencrypt the data. The limiting factor for this technique is the factthat the central user data server must have access to the decryption keyor keys, which means that any successful cyber-attack on the centraluser data server may also provide a cyber-criminal with access to thedecryption key or keys. Another technique to improve security is tolimit direct access to the central user data server via firewalls orother methods. Unfortunately, cyber-criminals have demonstrated theability to bypass such limitations, either by exploiting security flawsin the firewall devices or by obtaining administrative passwords viasophisticated phishing attacks.

Additional security measures known to have been taken by some entitiesinclude encrypting and protecting the decryption key or keys with apassword. While this undoubtably makes it more difficult for acyber-criminal, the same limitation applies: the key to decrypt thedecryption key for the user data still has to be accessible to thecentral user data server, and is thus vulnerable when a cyber-criminalsuccessfully compromises the central user data server.

Another security measure that has been suggested is to distribute theuser data across multiple servers. This is typically done in a mannersimilar to the way RAID storage units “stripe” data across multipledisks. That is, each user's data may be spread across multipledistributed storage locations, all of which need to be accessed and thedata combined in order to read that data. Current descriptions of thisapproach suffer from the same limiting factor as the many schemes forencrypting the user data—the central data server must know where thedata has been distributed in order to access it, and this knowledgebecomes accessible to a cyber-criminal when the central server iscompromised. Forcing a cyber-criminal to serially trace down multiplepieces of information in order to compromise the user data is only anincremental increase in security. It is not orders of magnitude moredifficult to access the user data once the central data server has beencompromised and the large quantity of valuable data that will be exposedby defeating a handful of additional incremental security measures stillmakes the target very worthwhile for such cyber-criminals.

Known security measures are typically designed to enhance the difficultyof breaking into central user data servers. Regularly occurringsuccessful cyber-attacks are evidence that known security measures arenot effective enough at protecting high value targets containing largevolumes of sensitive data stored in a central user data server. That is,the cost to a cyber-criminal is still less than the value of the dataobtained in a successful attack. As a result, such known measures do notsufficiently reduce incentives that make it worth-while forcyber-criminals to try to steal large volumes of sensitive data storedin a central user data server.

BRIEF DESCRIPTION OF THE INVENTION

No known security measures enhance security against cyber-attacks byreducing the value of the target. As a result, in one aspect, anindividual data unit for enhancing the security of a user data record isprovided that supports logical or physical distribution of user data,thereby reducing the attractiveness inherent in a centralized targetwhile simultaneously improving the security of the data of eachindividual user. Such an individual data unit also helps solve theproblem of a central data server having too much knowledge of where userdata is stored and how to decrypt that data by enabling new locations to“hide” such information by requiring that more components within acomputer system need to be accessed to see that information.

An individual data unit for enhancing the security of a user data recordis provided that includes a processor and a memory configured to storedata. The individual data unit is associated with a network and thememory is in communication with the processor. The memory hasinstructions stored thereon which, when read and executed by theprocessor cause the individual data unit to perform basic operationsonly. The basic operations include communicating securely with computingdevices, computer systems, and a central user data server. Moreover, thebasic operations include receiving a user data record, storing the userdata record, retrieving the user data record, and transmitting the userdata record. The individual data unit can be located in a geographiclocation associated with the user which can be different than thegeographic locations of the computer systems and the central user dataserver.

In another aspect, a computer system for enhancing the security ofencrypted user data records is provided that includes a plurality ofindividual data units. Each individual data unit is associated with arespective user and stores one or more data records for the respectiveuser. Moreover, the computer system includes at least one computingdevice associated with each respective user. The at least one computingdevice is for conducting network-based transactions and storing anencrypted logical address required to access the respective user dataunit. The encrypted logical address is different for the individual dataunit of each respective user. The computer system also includes acomputer configured as a central user data server. The server managesthe user data records and includes decryption keys for the encryptedlogical addresses. The individual data units, the at least one computingdevice, and the central user data server communicate securely over anetwork.

In yet another aspect, a method for enhancing the security of user datarecords is provided that includes storing an encrypted user data recordof each of a plurality of users on a respective data storage component.Each respective data storage component has a separate physical addressand logical address, and a separate secret access code. Moreover, themethod includes encrypting a logical address and an access code requiredto access each respective user data record, wherein the logical addressand the access code are different for each respective user data storagecomponent. Furthermore, the method includes storing the encryptedlogical address and access code for each respective user data storagecomponent on a computing device associated with the same user, andstoring on a central user data server, decryption keys for the encryptedlogical address and access code.

In another aspect, a method for enhancing the security of encrypted userdata records is provided that includes storing a plurality of encrypteddata records of each of a plurality of users on at least one separatecomponent per user communicating with a central user data server,wherein the separate component of each user has a unique logicaladdress, and each data record has a separate secret access code.Moreover, the method includes encrypting the logical address and theaccess code required to access each respective user data record. Theaccess code is different for each respective user data record.Furthermore, the method includes storing the encrypted logical addressand the encrypted access codes for each respective user data record on acomputing device associated with the same user, and storing on thecentral user data server, decryption keys for the encrypted logicaladdresses, encrypted secret access codes, and encrypted user datarecords.

In another aspect, a method for enhancing the security of user datarecords is provided that includes distributing in a computer system,encrypted logical addresses, encrypted secret access codes, encrypteduser data records, and decryption keys for the encrypted logicaladdresses, encrypted secret access codes, and the encrypted user datarecords such that: the data record of a user is safe against acyber-attack that compromises only one component of the computer system;the data record of a user can be compromised only when at least twocomponents of the computer system are compromised as the result of acyber-attack; and the data records of N users can be stolen only when atleast N+1 components of the computer system are compromised as theresult of a cyber-attack, where N is the number of users.

In yet another aspect, a method for enhancing the security of user datarecords in a computer system using M specialized storage componentsstoring the data of a single user only within the computer system isprovided. The method includes distributing in the computer system,encrypted logical addresses, encrypted secret access codes, encrypteduser data records, and decryption keys for the encrypted logicaladdresses, encrypted secret access codes, and encrypted user datarecords such that: the data record of a user is safe against acyber-attack that compromises only M components of the computer system;the data record of a single user can be compromised only when at leastM+1 components of the computer system are compromised as the result of acyber-attack; and the data records of N users can be compromised onlywhen at least (M×N)+1 components of the computer system are compromisedas the result of a cyber-attack, where N is the number of users and M isthe number of specialized storage components.

In another aspect, a hosted individual data unit platform is providedthat includes a plurality of individual data units implemented within asingle physical device. Each individual data unit includes a processorand a memory configured to store data. The individual data unit isassociated with a network and the memory is in communication with theprocessor. The memory has instructions stored thereon which, when readand executed by the processor cause the individual data unit to performbasic operations only, the basic operations including communicatingsecurely with computing devices, computer systems, and a central userdata server. Moreover, the instructions when read and executed by theprocessor cause the individual data unit to perform basic operationsincluding receiving a user data record, storing the user data record,retrieving the user data record, and transmitting the user data record.

In view of the above, it can be seen that the incentives for conductingcyber-attacks are dramatically reduced because a high volume ofsensitive user information is not stored in a manner that renders allthe data vulnerable to a single successful cyber-attack, or a smallcombination of such cyber-attacks. That is, the value of the target hasbeen reduced. By reducing the payoff for any small number of successfulcyber-attacks, and simultaneously raising the number of successfulcyber-attacks required to access any fraction of the data, thecost-benefit ratio increases to a point where it is no longer worthwhilefor cyber-criminals to attack such systems in order to obtain the userdata. In large systems with hundreds of millions of users—the verysystems that create such high incentives for cyber-criminals—it isimpractical to distribute user data, encryption/decryption keys, andother security information in ways that achieve these goals without theinclusion of the individual data units. With the enablement of theindividual data units, it is possible to distribute user data,encryption/decryption keys, and other information to enhance securityfor the user data.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram of an example computer system for enhancing thesecurity of user data;

FIG. 2 is a block diagram of an example individual data unit included inthe computer system as shown in FIG. 1 ;

FIG. 3 is a diagram of an example computer system that expands on theexample computer system shown in FIG. 1 by including two individual dataunits for one user and showing an example distribution of encryptedlogical addresses, encrypted access codes and decryption keys thatincreases the security of user data for that user;

FIG. 4 is a table which summarizes an analysis showing that thecompromise of any two components in the example computer system shown inFIG. 3 is inadequate to compromise the data record of a user;

FIG. 5 is a flowchart illustrating an example method for updating a userdata record in the computer system as shown in FIG. 1 ;

FIG. 6 is a diagram of an example Identity Management System (IDMS) forconducting authentication transactions that includes individual dataunits which store user data;

FIG. 7 is a flowchart illustrating an example method for authenticatinga user using the example IDMS and individual data units as shown in FIG.6 ;

FIG. 8 is a diagram of an example secure email computer system forenhancing email security using individual data units while enablinge-discovery;

FIG. 9 is a flowchart illustrating an example method for transmitting asecure email within the example computer system shown in FIG. 8 ;

FIG. 10 is a flowchart illustrating an example method for receiving asecure email within the example computer system shown in FIG. 8 ; and

FIG. 11 is a flowchart illustrating an example method of conducting ane-discovery search within the example computer system shown in FIG. 8 .

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 is a diagram of an example computer system 10 for enhancing thesecurity of user data. The computer system 10 includes an examplecentral user data server 12, a server 14 that provides additionalservices to users, an example point of service (POS) computer system 16,an example computing device 18, an example authentication computersystem 20, and example individual data units (IDUs) 22-1 to 22-n thatcommunicate over a network 24. The central user data server 12 and theserver 14 constitute an array of servers that communicate with eachother via the network 24. The server 14 may include any number of thesame or different servers that communicate with each other via thenetwork 24. For example, the server 14 may include a web server, anapplication server, an authentication server, an email server,e-discovery servers, or any servers associated with any servicesprovided over the network 24. Alternatively, the computer system 10 maynot include the server 14. The designation “n” as used in conjunctionwith the IDUs 22-1 to 22-n is intended to indicate that any number “n”of IDUs may be included in the computer system 10.

Although the example computer system 10 includes one POS computer system16 and one computing device 18, the example computer system 10 mayalternatively include any number of POS computer systems 16 andcomputing devices 18. For example, there may be millions of computingdevices 18, typically one or perhaps more for each user whose data isstored in the computer system 10.

Any networking scheme and any stack of network protocols may be used tosupport communications over the network 24 between the central user dataserver 12, the server 14, the POS computer system 16, the computingdevice 18, the authentication computer system 20, the example individualdata units (IDUs) 22-1 to 22-n, and any computer systems (not shown) andcomputing devices (not shown) that communicate over the network 24. Oneexample of a networking scheme and stack of protocols is TransportControl Protocol (TCP)/Internet Protocol (IP). Any type of networkprotocol may be used that facilitates the security of user data asdescribed herein.

A person who obtains or purchases goods or services during anetwork-based transaction, or who obtains or purchases goods or servicesin a brick and mortar store, is referred to herein as a user. Typically,entities, for example, merchants require that users be successfullyauthenticated before conducting a network-based transaction with theuser.

The central user data server 12 includes subcomponents such as, but notlimited to, one or more processors 26, a memory 28, a bus 30, and acommunications interface 32. General communication between thesubcomponents in the central user data server 12 is provided via the bus30.

The processor 26 executes instructions, or computer programs, stored inthe memory 28. As used herein, the term processor is not limited to justthose integrated circuits referred to in the art as a processor, butbroadly refers to a computer, a microcontroller, a microcomputer, aprogrammable logic controller, an application specific integratedcircuit, and any other programmable circuit capable of executing atleast a portion of the functions and/or methods described herein. Theabove examples are not intended to limit in any way the definitionand/or meaning of the term “processor.”

As used herein, the term “computer program” is intended to encompass anexecutable program that exists permanently or temporarily on anynon-transitory computer-readable recordable medium that causes thecentral user data server 12 to perform at least a portion of thefunctions and/or methods described herein. Application programs 34, alsoknown as applications, are computer programs stored in the memory 28.Application programs 34 include, but are not limited to, an operatingsystem, an Internet browser application, authentication applications andany special computer program that manages the relationship betweenapplication software and any suitable variety of hardware that helps tomake-up a computer system or computing environment.

The central user data server 12 manages user data for any type ofentity, for example, a merchant. As such, the central user data server12 performs functions including, but not limited to, establishing acentral user data server token and sharing a key for validating thecentral user data server token, registering new user accounts,registering new POS computer systems 16, accepting new or revised datafrom registered users, and conducting authentication transactions. Newor revised user data may include user contact information, referenceauthentication data, hash codes for user data, and keys to validatetokens for computing devices 18, POS computer systems 16, and IDUs 22-1to 22-n. Additionally, the central user data server 12 may compute andcompare hash codes for new or updated user data, and temporarily acceptand use copies of encryption keys to be applied to user data beingstored on the IDUs 22-1 to 22-n. Such temporarily accepted copies ofencryption keys are securely destroyed immediately after use.

The memory 28 may be any non-transitory computer-readable recordingmedium used to store data such as, but not limited to, computerprograms, decryption keys 36 for logical addresses of IDUs 22-1 to 22-n,decryption keys 38 for access codes of IDUs 22-1 to 22-n, decryptionkeys 40 for user data records, keys 42 to validate tokens from POScomputer systems 16 and computing devices 18, encryption keys 44 used toencrypt user data records, and a central user data server token 46. Thememory 28 may additionally include, or alternatively be, a disk storageunit (not shown) coupled to and in communication with the central userdata server 12.

As used herein, a logical address includes any addressing scheme thatcan ultimately be used to resolve the logical address to a specificphysical address within the network 24. In a TCP/IP scheme this wouldresolve to an IP address. An example IP address using IPv6 might be:2001:0db8:85a3:0000:0000:8a2e:0370:7334. A logical address is typicallya URL (Uniform Resource Locator) that is resolved into an IP address bya Domain Name Server (DNS). Media Access Control (MAC) addresses thatare physically embedded within each device are automatically resolvedusing the associated protocols of TCP/IP networks. Depending on how IPaddresses for IDUs are assigned and maintained, the logical addressesfor IDUs described herein may be the respective IP address of each IDU.

The decryption keys 40 correspond to the encryption keys 44 used toencrypt respective user data records. The encryption 44 and decryption40 keys are different from each other for asymmetric encryption and maybe the same for symmetric encryption. In the computer system 10, allencryption-decryption pairs of keys are asymmetric cryptographic keys.However, symmetric keys may alternatively be used should the computersystem 10 use asymmetric key pairs to securely transmit symmetric keys.

The encryption 44 and decryption 40 keys are different for each userdata record. Because entities like merchants may collect data formillions of customers, millions of decryption keys 36, 38, and 40 may bestored in the memory 28. Although the central user data server 12 storesthe decryption keys 36, 38, and 40, the central user data server 12typically does not store information regarding the physical location orthe logical address of the user data records corresponding to any of thedecryption keys 36, 38, and 40. As a result, if a cyber-criminalsuccessfully attacked the central user data server 12, thecyber-criminal would be able to steal the decryption keys 36, 38, and 40but not information regarding the physical or logical address of theuser data record. The physical or logical address as well as the accesscode are necessary to access the user data record corresponding todecryption keys 36, 38, and 40. Consequently, the decryption keys 36,38, and 40 by themselves are useless to cyber-criminals.

Non-transitory computer-readable recording media may be any tangiblecomputer-based device implemented in any method or technology forshort-term and long-term storage of information or data. Moreover, thenon-transitory computer-readable recording media may be implementedusing any appropriate combination of alterable, volatile or non-volatilememory or non-alterable, or fixed, memory. The alterable memory, whethervolatile or non-volatile, can be implemented using any one or more ofstatic or dynamic RAM (Random Access Memory), a floppy disc and discdrive, a writeable or re-writeable optical disc and disc drive, a harddrive, flash memory or the like. Similarly, the non-alterable or fixedmemory can be implemented using any one or more of ROM (Read-OnlyMemory), PROM (Programmable Read-Only Memory), EPROM (ErasableProgrammable Read-Only Memory), EEPROM (Electrically ErasableProgrammable Read-Only Memory), an optical ROM disc, such as a CD-ROM orDVD-ROM disc, and disc drive or the like. Furthermore, thenon-transitory computer-readable recording media may be implemented assmart cards, SIMS, any type of physical and/or virtual storage, or anyother digital source such as a network or the Internet from which acentral user data server can read computer programs, applications orexecutable instructions.

The communications interface 32 provides the central user data server 12with two-way data communications. Moreover, the communications interface32 may enable the central user data server 12 to conduct wirelesscommunications such as cellular telephone calls or to wirelessly accessthe Internet over the network 24. By way of example, the communicationsinterface 32 may be a digital subscriber line (DSL) card or modem, anintegrated services digital network (ISDN) card, a cable modem, or atelephone modem to provide a data communication connection to acorresponding type of telephone line. As another example, thecommunications interface 32 may be a local area network (LAN) card(e.g., for Ethernet™ or an Asynchronous Transfer Model (ATM) network) toprovide a data communication connection to a compatible LAN. As yetanother example, the communications interface 32 may be a wire or acable connecting the central user data server 12 with a LAN, or withaccessories such as, but not limited to, keyboards or biometric capturedevices used to support login by system administrators. Further, thecommunications interface 32 may include peripheral interface devices,such as a Universal Serial Bus (USB) interface, a PCMCIA (PersonalComputer Memory Card International Association) interface, and the like.Thus, it should be understood the communications interface 32 may enablethe central user data server 12 to conduct any type of wireless or wiredcommunications such as, but not limited to, accessing the Internet.

The communications interface 32 also allows the exchange of informationacross the network 24. The exchange of information may involve thetransmission of radio frequency (RF) signals through an antenna (notshown). Moreover, the exchange of information may be between the centraluser data server 12 and any other POS computer system 16, computingdevices 18, and IDUs capable of communicating over the network 24.

The network 24 may be a 5G communications network. Alternatively, thenetwork 24 may be any wireless network including, but not limited to,4G, 3G, Wi-Fi, Global System for Mobile (GSM), Enhanced Data for GSMEvolution (EDGE), and any combination of a LAN, a wide area network(WAN) and the Internet. The network 24 may include Radio FrequencyIdentification (RFID) subcomponents or systems for receiving informationfrom other devices. Alternatively, or additionally, the network 24 mayinclude subcomponents with Bluetooth, Near Field Communication (NFC),infrared, or other similar capabilities. The network 24 may also be anytype of wired network or a combination of wired and wireless networks.

The POS computer system 16 may store data such as, but not limited to, alogical address 48 for the central user data server 12, a POS systemtoken 50 for the POS computer system 16, keys 52 for validating tokensfrom other POS computer systems (not shown) and other computing devices(not shown), and transaction numbers and audit data 54.

One example of a POS computer system 16 is a service provider computersystem that functions as a concentrator and a firewall that userscommunicate with to remotely obtain goods or services via the Internet.Other examples include, but are not limited to, computerized registerstypically used to purchase goods inside a brick and mortar store.

The POS computer system 16 performs functions such as, but not limitedto, establishing the POS computer system token 50, and sharing withother POS computer systems (not shown) and other computing devices (notshown) the key used to validate the token 50. The POS computer system 16may also register other central user data servers (not shown), registerthe authentication computer system 20, conduct authenticationtransactions, create user data stored in a user data record, update userdata stored in a user data record, and retrieve user data from a userdata record. Additionally, the POS computer system 16 may includepolicies for determining levels of risk acceptable to the serviceprovider for conducting different types of network-based transactions.Alternatively, the policies for determining acceptable levels of riskmay be included in other computer systems (not shown). Moreover, the POScomputer system 16 may access any other data or services provided by anyother POS computer system (not shown).

POS computer systems 16 that are computerized registers are typicallyfound in a brick and mortar store and typically accept payments orotherwise authenticate users. Such POS computer systems may performother functions including, but not limited to, creating user data storedin a user data record, updating user data stored in a user data record,and retrieving user data from a user data record.

One example of the computing device 18 is a smart phone. Other examplesinclude, but are not limited to, tablet computers, phablet computers,laptop computers, and desktop personal computers. The computing device18 is typically associated with a user or with any type of entityincluding, but not limited to, commercial and non-commercial entities.

The computing device 18 associated with each respective user stores anencrypted logical address 56 of the IDU associated with the user and anencrypted access code 58 required to access the data record of therespective user. The logical address 56 is different for each IDU as isthe access code 58.

The computing device 18 may also store a computing device token 60 andkeys 62 to validate tokens from the central user data server 12, theserver 14, the POS system 16, the authentication system 20, and anyother computer systems (not shown) and any other computing devices (notshown) operable to communicate over the network 24. The logical address56 and access code 58 are encrypted before being stored in the computingdevice 18. Some users might be associated with more than one computingdevice 18. For example, some users may be associated with a smart phone,a tablet computer, and a laptop computer. When a user is associated withmore than one computing device 18, the encrypted logical address 56 andthe encrypted access code 58 may be stored on each computing device 18associated with the user.

The central user data server 12 receives the encrypted logical address56 and the encrypted access code 58 from the user computing device 18,and decrypts the encrypted logical address 56 and the encrypted accesscode 58 with the decryption keys 36 and 38, respectively. Should thecomputing device 18 associated with a user be stolen or successfullycompromised by a cyber-criminal, the encrypted logical address 56 andthe encrypted access code 58 would be useless unless the central userdata server 12 was also hacked and the corresponding decryption keysobtained.

The computing device 18 performs functions including, but not limitedto, establishing a computing device token and sharing the key thatvalidates the computing device token. Moreover, the computing device 18may validate hash codes, and accept and store encrypted logicaladdresses and encrypted access codes for IDUs. Additionally, thecomputing device 18 may collect user data, and securely send the userdata to the central user data server 12 which arranges for the use datato be stored on an IDU 22-1. The collected user data may include userauthentication data captured by the user computing device 18. Thecomputing device 18 may also include policies for determining levels ofrisk acceptable to a user for conducting different types ofnetwork-based transactions.

The authentication computer system 20 may store authentication policies,user liveness detection applications, authentication applications, andreference authentication data records. Authentication policiesfacilitate determining authentication data to be obtained from usersduring authentication transactions. Some policies may consider themaximum level of acceptable risk for a desired network-based transactionacceptable to the user and the service provider when determining theauthentication data to be obtained from a user during an authenticationtransaction. User liveness detection applications enable determiningwhether or not obtained biometric authentication data is of a liveperson.

Authentication applications enable conducting user verification andidentification transactions with any type of authentication data. Theprocess of verifying the identity of a user is referred to as averification transaction. Typically, during a verification transactionauthentication data is captured from a user. The captured authenticationdata is compared against corresponding reference authentication datapreviously collected and stored on the authentication server andtypically a matching score is calculated for the comparison. When thematching score meets or exceeds a threshold score, the captured andreference data are judged a match and the identity of the user isverified as true.

Authentication data is the identifying data desired to be used during averification or identification transaction. Authentication data asdescribed herein includes, but is not limited to, data of a biometricmodality, combinations of data for different biometric modalities,pass-phrases, personal identification numbers (PIN), physical tokens,global positioning system coordinates (GPS), and combinations thereof.Example biometric modalities include, but are not limited to, face,iris, finger, palm, and voice. Data for such biometric modalities istypically captured as an image or an audio file that may be furtherprocessed into templates for facilitating rapid comparisons with liveauthentication data captured during a verification transaction.

User authentication data records include reference authentication datawhich is used in authentication transactions. Reference authenticationdata is the data registered for each user to establish his or heridentity using different techniques. When authentication is based ondata of a biometric modality, the reference authentication data may beas captured from a user or may be a template derived from the captureddata. The authentication computer system 20 may store referenceauthentication data for different users on different storage devices(not shown) which may be located in different geographical locations.The authentication computer system 20 may include servers to facilitateperforming complex biometric or other comparisons between captured andreference authentication data.

A merchant may conduct out-of-store network-based transactions by havingthe central user data server 12 communicate directly with the computingdevice 18 during the transactions. Alternatively, or additionally,merchants may include points of service 16 between the computing devices18 and the central user data server 12 to minimize the number of directconnections to the central user data server 12. Such designs may includethousands of POS computer systems 16.

The POS computer system 16, computing device 18, and authenticationcomputer system 20 typically include subcomponents similar to thesubcomponents included in the central user data server 12. That is, thecentral user data server 12, the POS computer system 16, the computingdevice 18, and the authentication computer system 20 are typicallygeneral purpose computers capable of performing any of thousands ofdifferent functions when properly configured and programmed. The POScomputer system 16 and the computing device 18 may also include a userinterface (not shown) and a display (not shown).

The display (not shown) may include a visual display or monitor thatdisplays information to a user. For example, the display may be a LiquidCrystal Display (LCD), active matrix display, plasma display, or cathoderay tube (CRT). The user interface (not shown) may include a keypad, akeyboard, a mouse, a light source, a microphone, cameras, and/orspeakers. Moreover, the interface and the display may be integrated intoa touch screen display. Accordingly, the display may also be used toshow a graphical user interface, which can display various data andprovide “forms” that include fields that allow for the entry ofinformation by the user. Touching the screen at locations correspondingto the display of a graphical user interface allows the user to interactwith the POS computer system 16 or the computing device 18 to enterdata, change settings, control functions, etc. Consequently, when thetouch screen is touched, the interface communicates this change to theprocessor in the POS computer system 16 or user computing device 18, andsettings can be changed or information can be captured and stored in thememory.

The subcomponents of the central user data server 12, the server 14, POScomputer system 16, computing device 18, and authentication computersystem 20 involve complex hardware, and may include such hardware aslarge scale integrated circuit chips. Such complex hardware is difficultto design, program, and configure without flaws. As a result, thecentral user data server 12, the server 14, the POS computer system 16,the computing device 18, and the authentication computer system 20typically include design or configuration flaws. The central user dataserver 12, the server 14, POS computer system 16, computing device 18,and authentication computer system 20 also run large numbers ofsophisticated and complex software applications which typically includebugs, or flaws. Such sophisticated software programs typically havehundreds or thousands of known and documented flaws, and an unknownnumber of unknown flaws.

The general purpose nature of computers like the central user dataserver 12, POS computer system 16, computing device 18, andauthentication computer system 20 enables them to be economicallymanufactured based on the production of high volumes of identicalcomputers, each of which is custom configured by an administrator toperform desired functions. However, such economical manufacturingintroduces additional complexity and the potential for human errorbecause a person may make an error while customizing the configurationor administering day-to-day operations of the computer. Thus, the humanfactor involved in customizing the configuration and programming forthese computers adds to security vulnerabilities that can be exploitedby cyber-criminals. As a result, the overall complexity of generalpurpose devices introduces additional flaws that may be exploited bycyber-criminals during cyber-attacks. Any device that can serveunlimited multiple purposes is inherently more complex than a devicethat serves a limited purpose only.

In view of the above, it can be seen that the central user data server12, the server 14, POS computer system 16, computing device 18, andauthentication computer system 20 are vulnerable to cyber-attacks due tothe complexity of their hardware and internal firmware/software, thepotential for human errors, and potentially inconsistent administrativemanagement during a lifetime of operational use. It is the flawsintroduced by at least these factors that are typically exploited bycyber-criminals during cyber-attacks.

FIG. 2 is a block diagram of an example IDU 22-1. Because each IDU 22-1to 22-n is the same, IDU 22-1 only is described. Subcomponents of theIDU 22-1 include a processor 64, a memory 66, a bus 68, and acommunications interface 70. Communication between the subcomponents isprovided via the bus 68. The processor 64 executes instructions fromapplications 78 and other computer programs stored in the memory 66. Thememory 66 may be any non-transitory computer-readable recording mediumused to store data including, but not limited to, applications 78, auser data record 72, an IDU token 74, and keys 76 to validate tokensfrom POS computer systems 16 and computing devices 18. The encrypteduser data record 72 may be decrypted by the decryption key 40.Additionally, the IDU 22-1 may include security features that are commonon Hardware Security Modules such as tamper resistance and detection.

The communications interface 70 performs functions similar to thosedescribed herein for the communications interface 32. However, thecommunications interface 70 does not require the broad array ofdifferent communications options required of a general purpose computer.In addition, the application programs 78 of the IDU 22-1 are far lesscomplex than the central data server application programs 34 describedherein because the IDU 22-1 is specifically designed to perform alimited number of functions in a secure manner. A limited number offunctions may be as many as several dozen functions, but it is notthousands, and the functions are not unlimited in scope—the functionsare focused solely on operations that facilitate securing user data.These simpler applications, in turn, may be run on a smaller and lesspowerful processor 64 communicating across a simpler and less generalpurpose bus 68. As a result, the subcomponents of the IDU 22-1 areeasier to design and are thus less likely to include design flaws versusgeneral purpose computers. Likewise, the software subcomponentsunderlying the applications 78 of the IDU 22-1 are also orders ofmagnitude less complex than those in the central user data server 12,the server 14, the POS computer system 16, or the computing device 18.For instance, a general purpose operating system such as WINDOWS® orLINUX® may not be required on an IDU. The IDU 22-1 is thus not a generalpurpose computer. The IDU 22-1 is physically smaller, simpler, lessexpensive, and more secure than a general purpose computer because theIDU 22-1 is dedicated to the single purpose of securing user data.

As the number of functions that can be performed by the IDU 22-1increases, the number of potential design flaws increases as does thesoftware complexity. As a result, the IDU 22-1 becomes more vulnerableto successful cyber-attacks. As the number of functions that can beperformed by the IDU 22-1 decreases, the number of potential designflaws decreases as does the software complexity. As a result, the IDU22-1 is less vulnerable to successful cyber-attacks and thus facilitatesincreasing the security of the user data record 72 stored therein. Inview of the above, it can be seen that security is facilitated to bemaximized when the IDU 22-1 is specifically designed and manufactured tofacilitate a single function like securely storing the data of one user.

The IDU 22-1 may be any device capable of running simple applicationprograms 78 that enable performing basic functions only. The IDU 22-1may alternatively perform more functions than the basic functionsdescribed herein. However, there is a tradeoff in that additionalfunctions imply increased complexity which in turn increases thesusceptibility to design or implementation flaws that can be exploitedby cyber-criminals. In addition, as the complexity increases so does thepossibility of errors resulting from the human factor.

The IDU 22-1 may be no larger in physical size or logical complexitythan an electronic car key fob. Example basic functions include, but arenot limited to, receiving and transmitting the data in the user datarecord 72, and storing and retrieving the data in the user data record72. The application programs 78 are very small and simple, thus areeasily verifiable and auditable and typically include few if any flaws.Consequently, the IDU 22-1 has fewer software flaws that can beexploited by cyber-criminals conducting cyber-attacks. Because the IDU22-1 has fewer design and software flaws, the IDU 22-1 is more secureagainst cyber-attacks than general purpose devices like mobile phones orsmall laptop computers.

Other basic functions that may be performed by the IDU 22-1 include, butare not limited to, establishing the IDU token 74, sharing a key used tovalidate the IDU token, and receiving and storing setup information froma user via a computing device 18 or buttons and displays on the IDUitself. Such setup information may include information for connectingthe IDU to a the network 24, information required to establish thephysical and logical address of the IDU 22-1, information to establishkeys to validate tokens from servers or devices that may communicatedirectly with the IDU 22-1, and information for establishingrestrictions on which sources of network messages may be processed.

The IDU 22-1 may also receive via the network 24 the encryption key 44and a user data record, encrypt the user data record with the encryptionkey 44, and store the encrypted user data record as the user data record72 in the memory 66. Additionally, the IDU 22-1 may receive theencryption key 44 and store the key 44 in the memory 66. Upon receivinga user data record and a request from the central user data server 12,the IDU 22-1 may encrypt the received user data record and store theencrypted user data record as the user data record 72 in the memory 66.The IDU 22-1 may also receive the decryption key 40 and decrypt the userdata record 72 stored therein using the decryption key 40.

Alternatively, or additionally, the IDU 22-1 may encrypt the logicaladdress 56 and access code 58, compute a hash code for the user datarecord 72, and send the encrypted logical address 56, the encryptedaccess code 58, and the hash code to the computing device 18. The IDU22-1 may also send to the central user data server 12 decryption keysfor the logical address 56 and access code 58 of the IDU 22-1 as well asthe decryption key 40 for the user data record 72, and a hash code forthe user data record 72. The IDU 22-1 may also obfuscate physicaladdresses or use dark net technologies to improve anonymity of the IDUand protect the IDU against sniffing and traffic analysis threats.Additionally, the IDU 22-1 may back-up the user data record 72 to anycomputing device or computer system included in the computer system 10.The IDU 22-1 may also detect networks, accept inputs to completeconnection to a network, automatically restore connection to the networkafter the connection is temporarily disrupted, display the status of anetwork connection, and restrict network access to the IDU 22-1 to onlyspecified computing devices and computer systems. The inputs may beentered using buttons or displays on the IDU 22-1.

The IDU 22-1 may also include basic functions to change the physical orlogical addresses of the IDU, and change the access code 58 required toaccess the user data record 72.

A most likely additional function of the IDU 22-1 is storing multipledata records 72 for one user who interacts with multiple serviceproviders. When multiple data records 72 are stored in the IDU 22-1, thedata from one service provider is not disclosed to a different serviceprovider. Moreover, an access code for each of the multiple data records72 is stored in the IDU 22-1. Each different access code corresponds toa different service provider with whom the user interacts. The IDU 22-1responds to an incoming communication only when an access code in thecommunication matches one of the multiple access codes stored therein.Alternatively, the IDU may use a completely separate access code forauthorizing access to the IDU that is different from the access codesused to authorize access to specific user data records. Adding suchsimple functions to the IDU does not remove the characteristic of beingorders of magnitude less complex than a general purpose computer andthus far more secure.

The user data record 72 may include any information about a user as wellas information collected by a service provider about the user. Forexample, data collected by airlines for a passenger may include thename, date of birth, passport number, billing address, credit cardinformation, and various flight preferences such as aisle or windowseating of the passenger. Thus, the user data record 72 of an airlinepassenger, or user, typically includes such information. Additional datathat may be stored in a user data record 72 includes, but is not limitedto, reference authentication data, and the user's gender, age,citizenship and marital status. Although the user data record 72 isstored in the IDU 22-1, the central user data server 12 orchestratesaccess to the user data record 72.

Each IDU 22-1 to 22-n included in the computer data system 10 isassociated with a respective user and stores the data for thatrespective user in a user data record 72. Storing the data for each userin a respective user data record 72 decentralizes user data. Thisdecentralization combined with secure distributions of data anddecryption keys results in the user data records 72 constituting a lessattractive target to cyber-criminals than a centralized data basebecause a limited number of successful cyber-attacks will onlycompromise the data of one or a few users. That is, decentralization ofthe user data records 72 enhances security for user data by bothincreasing the cost and decreasing the benefit for cyber-criminals toconduct attacks.

Compromise as used herein is intended to mean gaining access to data ona computing device or computer system that was intended to be secret.For example, in order to compromise all of the user data managed by thecentral user data server 12 a cyber-criminal would need to successfullygain access to the all the encrypted logical addresses 56, all theencrypted access codes 58 as well as the central user data server 12itself. Additionally, if a cyber-criminal compromised the IDU orcomputing device 18 of a user, the cyber-criminal would not havesufficient information to access and decrypt the data record 72 of thatuser.

The IDU for each respective user may be located at and operated from ageographical location associated with the respective user.Alternatively, the IDU for each respective user may be located at andoperated from geographic locations not associated with the respectiveuser. Such alternative locations may include co-location with thecentral user data server 12, or locations not co-located with thecentral user data server 12. Hence, the IDUs may be geographicallydistributed and may thus alternatively be referred to as distributeddata units. Because the IDUs may be geographically distributed the userdata records 72 may also be geographically distributed.

As the IDU 22-1 is simple, the IDU 22-1 is very inexpensive relative togeneral purpose computing devices such as laptops or mobile phones. Thislow cost makes the massive distribution of user data via IDUs practical.Such massive distribution and effective security would not be practical,for instance, using a second mobile phone for each user. This is becausemobile phones would be orders of magnitude more costly than the IDUs. Inaddition, mobile phones are general purpose devices and as such are farmore susceptible to successful cyber-attacks.

A user is typically responsible for managing his or her IDU. Some userswish to retain personal control over their IDU to prevent mismanagementof the user data record 72 stored therein by a third party, and to avoidhuman error by a third party that may leave the user data record 72stored therein more vulnerable to successful cyber-attacks. These usersbelieve that the user data record 72 stored in his or her IDU is moresecure when managed by his or her self. As part of managing his or heruser data record 72, some users may purchase several IDUs to morethoroughly distribute his or her user data and decryption keys tofurther enhance security against cyber-attacks. Thus, it should beunderstood that using multiple IDUs may facilitate increasing thesecurity of user data records 72 to arbitrarily high levels.

Although the access code 58 facilitates enhancing the security of userdata records 72, some users who manage the user data record 72 in his orher IDU may decide that an access code is not necessary to meet his orher desired level of data security. Thus, the access code 58 mayalternatively not be stored in the computing devices 18 of such users.As a result, for such users the access code 58 is not factored into thesecurity of his or her user data record 72. It should be understood thatby not using the access code 58, security of the user data record 72 maybe reduced. IDU manufacturers may omit the implementation of an accesscode, or for IDUs that include the option of using an access code usersmay indicate during setup of the IDU that the access code 58 is not tobe used, for example, by activating a switch on the IDU 22-1 or byinteracting with an application on the computing device 18 to configurethe IDU. Users who decide to enhance security for his or her IDU mayindicate in the same manner that the access code 58 is to be used. Theaccess code is optional because the IDU 22-1 provides orders ofmagnitude better security than current systems, even without an accesscode.

Instead of geographically distributing the IDUs and thus the user datarecords 72, the IDUs may alternatively be co-located with the centraluser data server 12. Specifically, the IDUs of multiple users may bephysically co-located within one or more physical devices accessed bythe central user data server 12. For example using Large ScaleIntegrated Circuits (LSICs) or Application Specific Integrated Circuits(ASICs), a single circuit board could host the equivalent of hundreds orthousands of individual IDUs. Such a large number of IDUs, whetherhosted on an integrated circuit board or not, is referred to herein as a“hosted IDU platform” and all the included IDUs are managed by a thirdparty instead of by the individual users. However, it should beunderstood that IDUs implemented in this manner each retain a uniquelogical address and a unique access code and would need to beindividually compromised by a cyber-criminal attempting to access allthe user data in the physical device. IDUs hosted on the IDU platformmay also retain unique physical addresses within each circuit board. TheIDUs may alternatively, or additionally, be similarly included on ahosted IDU platform in any other computer system (not shown) or anyother computing device (not shown) capable of communicating with thecentral user data server over the network 24.

It should be understood that each IDU in a hosted IDU platform isconsidered a separate component for purposes of describing orcalculating the security protections afforded to the user data record 72of each IDU included in a hosted platform.

The circuit board may have a single physical address that encompassesall of the IDUs on the circuit board, in which case there is a uniquelogical address or a unique access code or both for accessing the IDU ofeach user within the circuit board. Alternatively, each IDU on eachcircuit board may have a different physical address, a unique and secretlogical address, and a secret access code that adds a layer of security.

Each individual data unit has functions including, but not limited to,functions for power supply, external connections, tamper resistance,tamper detection, encryption, decryption, and communications with othercomputing devices. When the IDUs are physically co-located within one ormore physical devices, it should be appreciated that some or all ofthese functions may be shared between the IDUs.

When the circuit board assigns unique IP addresses to each IDU on thecircuit board, it is possible to build dark net technologies into thecircuit boards that could mask the IP addresses of the individual IDUs,thus adding yet another layer of security. The most common dark nettechnique for masking IP addresses includes a processor on the circuitboard that acts as an intermediate web node that is the only real IPaddress that can be observed while monitoring network traffic. This nodewould assign changing virtual IP addresses to the IDUs and use thesevirtual IP addresses when communicating with external computers. Whenthe non-IDU computers use the virtual IP address to respond to the IDU,this node translates the virtual IP address into the real physical IPaddress of the IDU being addressed. Such dark net techniques are notrestricted to hosted IDU platforms and could also be applied to IDUsthat are not part of a hosted platform.

A hosted IDU platform utilizing multiple IDUs on a single circuit boardfacilitates reducing manufacturing costs and also facilitates thirdparty management of the data records 72 for any user not interested inmanaging his or her user data record 72. If dark net technologies areincluded on the circuit board, the hosted IDU platform facilitatesfurther enhancing the security of user data records 72 stored on theseIDUs.

Because some users prefer to personally manage the data record 72 in hisor her IDU and others prefer third party management, the computer system10 includes both personally managed IDUs 22-1 to 22-n as well as hostedIDU platforms (not shown) managed by third parties. Alternatively, thecomputer system 10 may include personally managed IDUs 22-1 to 22-nonly, or hosted IDU platforms only (not shown).

In current state-of-the-art computer systems with distributed andencrypted user data records, the associated addresses and decryptionkeys for the user data records are typically stored on the central userdata server only. Storing the user data records 72, encrypted logicaladdresses 56 of those records, encrypted access codes 58, and associateddecryption keys 36, 38, and 40 on different computer systems anddifferent computing devices that are not all known to the central dataserver enhances the difficulty of compromising any user data record 72in a single cyber-attack because at least two physically separatecomputer systems must be compromised instead of one and successfullycompromising two computer systems yields only a single user data record.Compromising the data records 72 of all users, or a large number ofusers, for example a million users, requires compromising N plus oneseparate computers where N is the number of users. That is, theresources required to obtain user data increases proportionately to theamount of data to be compromised.

In the example computer system 10, a cyber-criminal needs tosuccessfully compromise one of the following pairs of computers and/orcomputing devices to compromise the user data record 72 for a singleuser: 1) central user data server 12 and IDU 22-1; 2) central user dataserver 12 and user computing device 18; or, 3) user computing device 18and IDU 22-1. After the central user data server 12 is compromised in asuccessful cyber-attack, the central user data server 12 need not beattacked again because the information stored therein was alreadyobtained. However, to compromise a million users by attacking the firstand second pairs, cyber-criminals need to replicate successful attacksagainst either a million computing devices 18 or a million IDUs. Tocompromise a million users by attacking the third pair listed above,cyber-criminals need to replicate successful attacks against a millioncomputing devices 18 as well as a million IDUs. As a result, theattractiveness of attacking the computer system 10 is facilitated to bereduced and the security of the user data records 72 is facilitated tobe enhanced because a single or small number of user data records 72 istypically of little value to cyber-criminals.

IDUs enable additional locations for storing data and keys whichfacilitates increasing the number of successful cyber-attacks requiredto compromise any of the user data in the computer system 10 compared toknown state-of-the-art security methods. Moreover, the hacking effortrequired by cyber-criminals to compromise a large number of IDUs andcomputing devices 18 increases in direct proportion to the number ofusers being attacked.

FIG. 3 is a diagram of an example computer system 80 that expands on thecomputer system 10 shown in FIG. 1 by including two IDUs 22-1 and 22-2for one user, and showing an example distribution of encrypted logicaladdresses 56, encrypted access codes 58, and decryption keys 36, 38, and40E that increases the security of user data for that user. Theencrypted decryption key 40E for user data is the same as the decryptionkey 40 for user data shown in FIG. 1 ; however, the decryption key 40Eis encrypted. Additionally, the encrypted logical addresses 56,encrypted access codes 58, and decryption keys 36, 38, 40E aredistributed throughout the computer system 80 in a manner that enhancesthe difficulty of compromising the user data record 72 because at leastthree physically separate components of the computer system 80 need tobe compromised instead of two. More specifically, the encrypted logicaladdress 56 and encrypted access code 58 for IDU 22-2 are stored on thePOS computer system 16, the decryption keys 36, 38 for IDU 22-1 arestored on the IDU 22-2, the encrypted user data record 72 is stored onthe IDU 22-1, and the decryption key 40E is stored in the central userdata server 12. Additionally, the encrypted logical address 56 for IDU22-1, the encrypted access code 58 for IDU 22-1, the decryption keys 36,38 for the IDU 22-2, and a decryption key 82 for the decryption key 40Eare stored in the user computing device 18. The central user data server12 may also store additional encrypted decryption keys 40E in the eventthat each IDU for that user is encrypted with a different key. That is,different users encrypt user data using different encryption keys, but asingle user may encrypt his or her user data stored on multiple IDUsusing either the same encryption key or different encryption keys.

Associating users with two IDUs facilitates distributing the encryptedlogical addresses 56, the encrypted access codes 58, and the decryptionkeys 36, 38, 40E in a manner that requires compromising at least threecomponents of the computer system 80 to gain access to the data record72 of a single user. Increasing the number of IDUs associated with eachuser facilitates causing cyber-criminals to compromise M+1 components ofthe computer system 80 to access the data record 72 of a single user,where M is the total number of IDUs used by each user to distributeencrypted logical addresses 56, encrypted access codes 58, anddecryption keys 40, or fractional parts thereof. That is, for usersassociated with two IDUs, M=2. If all users of the computer system 80use two IDUs in the described manner, then a cyber-attack would have tocompromise at least (M×N)+1 components of the computer system 80 tocompromise all the user data in the system 80, where N is the number ofusers in the computer system 80. Thus, it can be seen that the securityof all user data in the computer system 80 is enhanced by orders ofmagnitude rather than incrementally.

Although the user is associated with two IDUs 22-1 and 22-2 in thecomputer system 80, each user may alternatively be associated with anynumber of IDUs such that any subset of users or all users are associatedwith multiple IDUs. When a user is associated with more than one IDU,each IDU associated with that user may store the same user data record72. The extra IDUs improve redundancy and thus the reliability ofstorage for the user data record 72. For example, by replicating theuser data record 72 in multiple IDUs and distributing the IDUs acrossdifferent networks and different power sources, a user can protectagainst network or power failures. Alternatively, a subset of userscould elect to use a separate IDU for each service provider storingtheir user data. Security of user data records 72 may be furtherenhanced by breaking the encrypted logical addresses 56, the encryptedaccess codes 58, and the decryption keys 36, 38, 40E into fractionalparts and distributing the parts to an arbitrary number of IDUs.

Allowing encrypted access code 58 use to be optional, associating userswith more than one IDU, and breaking data into parts which aredistributed amongst the components of the computer system 80 are factorseffecting the security of user data records 72. By manipulating at leastthese factors any single user, any subset of users, or all users canfacilitate increasing the security and reliability of his or her userdata records 72. Thus, it should be appreciated that the level ofsecurity for the data record 72 of each user can be tailored by therespective user in many different ways. For example, some users may optto use the access code 58 while others may not, some users may opt touse multiple IDUs while others may not, and some users may opt to breakdata into parts while others may not.

Instead of distributing the data and keys as described herein withregard to the computer system 80 as shown in FIG. 3 , the data and keysmay be distributed in the computer system 80 similar to the distributiondescribed with regard to the computer system 80 as shown in FIG. 3except as follows: adding centralized storage of encrypted user datarecords 72 attached directly to the central user data server 12, oradding network 24 storage of encrypted user data records 72 accessibleto the central user data server 12 instead of storing user data records72 on IDUs; and, distributing the encrypted decryption keys for userdata 40E in the IDU 22-1 instead of in the central user data server 12.Such an alternative distribution of data and keys requires thecompromise of at least three separate components to compromise the datafor a single user and the compromise of (2×N)+1 components to compromiseall the user data for all the users. The tradeoff is that central userdata server 12 is more vulnerable to a brute force attacks of all theencrypted user data records 72 stored in the central location. Thistradeoff may be acceptable to many network service providers.

It should be appreciated that such a distribution of data and keysfacilitates achieving most of the security advantages of IDUs in legacycomputer systems with centralized storage of user data records 72, butwithout having to immediately distribute the user data records 72centrally stored therein to IDUs.

FIG. 4 is a table 84 which summarizes an analysis showing thatcompromising any two components of the computer system 80 is notsufficient to compromise a user data record 72. For example, it can beseen from the first line of table 84 that when the computing device 18and the IDU 22-2 of a user are compromised, the data record 72 of theuser is not compromised because the cyber-criminal does not have theencrypted decryption key 40E from the central user data server 12. Asanother example, as can be seen from the seventh line of the table 84,when IDU 22-1 and IDU 22-2 are compromised, the data record 72 of theuser is not compromised because the cyber-criminal does not have theencrypted decryption key 40E from the central user data server 12 anddoes not have the decryption key 82 from the computing device 18 of theuser. The same is true when the POS computer system 16 and the IDU 22-1of a user are compromised. As yet another example, as can be seen fromthe third line of the table 84, when the computing device 18 of the userand the central user data server 12 are compromised, the data record 72of the user is not compromised because the cyber-criminal does not havethe decryption keys 36 and 38 for the encrypted logical address 56 andencrypted access code 58, respectively, of the IDU 22-1.

In view of the above, it should be appreciated that cyber-criminals needto compromise at least three components of the computer system 10, thecomputer system 80, or any similar computer system to compromise thedata record 72 of a single user, and (2×N)+1 components to compromiseall the data for N users if all the users are using two IDUs configuredfor additional security as described herein with regard to FIG. 3 . Bycontinuing to add IDUs for each user it is possible to continueincreasing the security such that (M×N)+1 components must be compromisedto compromise all the data for N users if all the users are using M IDUsconfigured for additional security.

FIG. 5 is a flowchart 86 illustrating an example method for updating auser data record 72 in the computer system 10 as shown in FIG. 1 . Themethod starts 88 with a user operating his or her computing device 18 torequest initiating 90 a network-based transaction with the POS computersystem 16. Such transactions include, but are not limited to, purchasingmerchandise from a merchant website, purchasing an airline ticket, andaccessing information from a computer system. For an airline,information that may be accessed might include the date, times, andcosts of available flights. In addition to initiating 90 the networkbased transaction, the computing device 18 of the requesting usertransmits 92 to the POS computer system 16 the encrypted logical address56 and encrypted access code 58 for the IDU associated with therequesting user to enable retrieval of the user data record 72. If therequesting user is associated with multiple IDUs, then the encryptedlogical address 56 and encrypted access code 58 for each IDU associatedwith the requesting user are transmitted.

In response, the POS computer system 16 continues by requesting that theauthentication computer system 20 verify 94 the identity of therequesting user in a verification transaction. Alternatively, the POScomputer system 16 may conduct the verification transaction.Verification of the user identity implicitly authorizes the requestinguser to conduct the transaction. Alternatively, the POS system 12 maycontinue by determining whether or not a verified user is authorized toexecute a requested transaction.

When the identity of the user is not verified 94, the POS computersystem 16 does not conduct the requested network-based transaction, maynotify the user of the unsuccessful verification, and processing ends96. Otherwise, the POS computer system 16 continues by retrieving 98 theuser data record 72. More specifically, the POS computer system 16continues by automatically transmitting the encrypted logical address 56and encrypted access code 58 to the central user data server 12. Thecentral user data server 12 uses the decryption keys 36 and 38 todecrypt the encrypted logical address 56 and the encrypted access code58, respectively, and uses the logical address 56 and access code 58 toaccess the user data record 72 in the IDU 22-1 of the requesting user.The central user data server 12 then decrypts the user data record 72using the decryption key 40 and transmits the decrypted user data record72 to the POS computer system 16.

Next, the POS computer system 16 continues by conducting 100 thetransaction, which may or may not involve updates to the user datarecord 72. Conducting 100 the transaction may involve multiplecommunications over the network 24 with the computing device 18 of therequesting user, resulting from, for example, retrieving multipleairline flight schedules before purchasing tickets.

After conducting 100 the transaction, processing continues by deciding102 whether or not to update the data record 72 of the requesting user.The decision to update is based on whether the requesting user changedany information stored in his or her user data record 72, or whether thetransaction included additional information that should be stored in thedata record 72 of the requesting user. Such changes may include changinghis or her mailing address and such additional information may includedata regarding a purchase. Alternatively, any other criteria may be usedto determine if the user data record should be updated. If no update 102is required, processing ends 96.

If the user data record 72 is to be updated 102, the POS computer system16 continues by updating the data record 72 of the requesting user, andrequesting encryption and storage 104 of the updated user data record72. More specifically, the POS computer system 16 continues bytransmitting the updated user data record 72 and the encrypted logicaladdress 56 and encrypted access code 58 for the IDU associated with therequesting user to the central user data server 12. The central userdata server 12 continues processing by encrypting 104 the user datarecord 72 using the encryption key 44, decrypting the encrypted logicaladdress 56 and the encrypted access code 58 for the IDU of therequesting user, and storing 104 the updated data record 72 on the IDUassociated with the requesting user.

Next, the central user data server 12 continues by notifying 106 the POScomputer system 16 that the user data record 72 was successfully updatedand stored in the IDU associated with the user. In response, the POScomputer system 16 continues by notifying the computing device 18 of therequesting user that the network-based transaction was completed.Depending on the type of network based transaction, the computing device10 of the requesting user may or may not display an acknowledgement forthe user to see. Next, processing ends 96.

Although the example method for updating a user data record 72implicitly releases the encrypted logical address 56 and encryptedaccess code 58 for the IDU of the requesting user from the computingdevice 18 of the requesting user after successful verification, thisrelease may alternatively not be implicitly authorized after successfulverification. Rather, the POS computer system 16 may request theencrypted logical address 56 and the encrypted access code 58 from thecomputing device 18 of the requesting user, and the requesting user maybe required to explicitly authorize the release of the encrypted logicaladdress 56 and the encrypted access code 58 from the computing device ofthe requesting user. The user may authorize release in any manner, forexample, by speaking a voice command into the computing device 16 or bypressing a button or icon on the computing device 18.

Although the updated user data record 72 is encrypted and stored 104after each update 102 in the example method for updating a user datarecord 72, the updated user data record 72 may alternatively beencrypted 104 and stored 104 after the end of the user session or aftera set number of network-based transactions have been conducted and theresults for the set number of transactions have been accumulated by thePOS computer system 16. The set number of transactions may be any numberthat facilitates efficiently updating user data records 72.

Although the POS computer system 16 conducts the network-basedtransaction in the example method, the network-based transaction mayalternatively be conducted directly between the computer device 18 ofthe requesting user and the central user data server 12. In suchnetwork-based transactions, the user data record 72 is updated by thecentral user data server 12 to include data collected from the computingdevice 18 of the requesting user. Moreover, in such network-basedtransactions, the central user data server 12 may perform all thefunctions that the POS computer system 16 performs in the examplemethod.

It should be understood that communications over the network 24 may besecured in any manner. For example, a decrypted user data record 72 maybe temporarily encrypted while being transmitted over the network 24from the central user data server 12 to the POS computer system 16.

Although the computing device 18 of the requesting user transmits 92 theencrypted logical address 56 and encrypted access code 58 for each IDUassociated with the requesting user, the computing device 18 of therequesting user may alternatively transmit the encrypted logical address56 and encrypted access code 58 for a single IDU associated with therequesting user to the central user data server 12. The other encryptedlogical addresses 56 and encrypted access codes 58 could be sent uponcentral user data server request. The encrypted logical addresses 56 andencrypted access codes 58 may alternatively be sent according to manydifferent protocols.

FIG. 6 is a diagram of an example Identity Management System (IDMS) 108for conducting authentication transactions that uses IDUs to store userdata associated with the IDMS function. FIG. 6 includes similarinformation as FIG. 1 . Consequently, features illustrated in FIG. 6that are identical to features illustrated in FIG. 1 are identifiedusing the same reference numerals in FIG. 6 . The example IDMS 108 issimilar to the computer system 10 shown in FIG. 1 . However, the IDMS108 includes an external computer system 110 and the IDUs storereference authentication data only. Because the IDUs store referenceauthentication data only, the IDUs are described herein asauthentication data IDUs and are identified with reference numerals22-1-AD to 22-n-AD. The computing device 18 of each user stores thetoken 60 and keys 62, an encrypted logical address 112 and an encryptedaccess code 114 for the authentication data IDU of a respective user.

The IDMS 108 may be used to facilitate conducting verificationtransactions. For example, for users desiring to conduct a network-basedtransaction with the external computer system 110 using his or hercomputing device 18, the external computer system 110 may communicatewith the IDMS 108 to authenticate the user before allowing the user toconduct the desired transaction. More specifically, after receiving arequest to conduct the desired transaction, the external computer system110 may transmit to the POS computer system 16 a request to authenticatethe user. The POS computer system 16 may transmit the authenticationrequest to the authentication computer system 20. By virtue of receivingand transmitting the authentication request, the POS computer system 16can be said to function as a firewall. Alternatively, the externalcomputer system 110 may transmit the authentication request directly tothe authentication computer system 20.

FIG. 7 is a flowchart 116 illustrating an example method forauthenticating a user using the example IDMS 108 and IDUs as shown inFIG. 6 . In this example method, reference authentication data is storedin the IDU associated with the user. The method starts 118 with a userinitiating 120 a transaction with the external system 110 using his orher computing device 18. In response, the external system 110 continuesby requesting 120 that the IDMS 108 verify the identity of the user.More specifically, the external system 110 transmits the request to thePOS computer system 16 which forwards the authentication request to theauthentication computer system 20 together with any information requiredto communicate with the computing device 18 of the user. Next, theauthentication computer system 20 continues by instructing the computingdevice 18 of the user to capture live authentication data from the user.In the example method, the live authentication data is data for abiometric modality. In response, the computing device 18 continues byprompting 122 the user to capture live authentication data of his or herself.

Next, the user responds to the prompt by capturing 124 liveauthentication data of his or her self with the computing device 18which continues by transmitting 124 the captured live authenticationdata to the authentication computer system 20. The computing device 18also transmits 124 to the authentication computer system 20 theencrypted logical address 112 and the encrypted access code 114 for theauthentication data IDU 22-1-AD of the user. The authentication computersystem 20 continues by transmitting the captured live authenticationdata, the encrypted logical address 112, and the encrypted access code114 to the central user data server 12 with a request to retrieve thereference authentication data from the IDU 22-1-AD associated with theuser. The central user data server 12 continues by decrypting 126 theencrypted logical address 112 and the encrypted access code 114 usingthe decryption keys 36 and 38, respectively, then requesting 126 thereference authentication data of the user from the authentication dataIDU 22-1-AD of the user.

In response, the authentication data IDU 22-1-AD of the user continuesby transmitting 128 the encrypted reference authentication data of theuser to the central user data server 12. Next, the central user dataserver 12 continues by decrypting the reference authentication datausing the decryption key 40, computing and validating a hash code thatproves the reference authentication data has not been tampered with, andtransmitting the reference authentication data and validation result tothe authentication computer system 20. The authentication computersystem 20 may alternatively calculate and validate the hash code for thereference authentication data. After receiving the referenceauthentication data and validation result from the central user dataserver 12, the authentication computer system 20 continues by conducting130 a verification transaction with the decrypted referenceauthentication data and the captured live authentication data, andtransmitting 130 the verification transaction result to the externalsystem 110. Next, processing ends 132.

Users may use several different IDUs to partition and separately storedifferent kinds of reference authentication data. For example, a usermay store fingerprints from his or her right hand on one IDU,fingerprints from his or her left hand on a second IDU, a facial imageon another IDU, and a voice print on yet another different IDU. Bypartitioning the reference authentication data of a user in this manner,even if one IDU was compromised, uncompromised data would still exist inanother different IDU.

IDUs may also be used to help create very secure email systems. Emailsystems may be secure or non-secure. Non-secure email systems typicallyinclude an email server which stores emails in a database and whichmanages access to the emails based on a password only. In a non-secureemail system, if the email password of a user is compromised, all emailcontent for that user could be compromised. If the password of an emailadministrator is compromised, all the emails for all the users in theemail system could be compromised. Secure email systems typicallyinclude an email server, a database for non-secure email contents and aseparate database for secure email contents. Generally, upon receiving asecure email an email server stores the contents of the secure email inthe secure email database, assigns a transaction number to the receivedsecure email, and creates a link between the transaction number and thestored secure email contents. Additionally, the email server typicallycreates a non-secure email using the addresses from the secure email andincludes the transaction number as the contents of the non-secure email.Such a non-secure email is referred to herein as a cover email. Thenon-secure cover email is in the inboxes of all the addresseesidentified in the secure mail.

E-mails typically include a message and perhaps attachments. The messageand attachments are generally known as the contents of the email. A userwho creates and sends an email is referred to herein as an originator ora sender, a user who re-sends an email but did not create the email mayalso be referred to herein as a sender, and a user who receives an emailis referred to herein as a recipient. Recipients may include users towhom the email is addressed as well as users copied on the email.

The example secure email computer system illustrated in FIG. 8 issimilar to the IDMS illustrated in FIG. 6 . As such, featuresillustrated in FIG. 8 that are identical to features illustrated in FIG.6 are identified using the same reference numerals used in FIG. 6 .

FIG. 8 is a diagram of an example secure email computer system 134 forenhancing email security using IDUs while enabling e-discoveryprocesses. The example secure email (SE) computer system 134 includes anIDMS that can perform the same authentication functions as the IDMS 108described herein with regard to FIG. 6 . Additionally, the SE computersystem 134 includes a hosted IDU platform 136, and the server 14includes an offline e-discovery server 14-0, an e-discovery searchserver 14-S, and an email server 14-E. Although not included in the SEcomputer system 134, the external computer system 110 may also beincluded.

Each user is associated with one Secure Email IDU and one authenticationdata IDU. Each authentication data IDU stores reference authenticationdata of a respective user, and each Secure Email IDU stores encryptedsecure email contents sent and received by a respective user. Storingboth the sent and received encrypted secure email contents minimizes thenumber of users involved in any e-discovery process because none of theusers who sent secure emails to a user of interest need be involved.Alternatively, the Secure Email IDU for each user may store theencrypted contents of sent emails only. The Secure Email IDUs and theauthentication data IDUs may additionally store the same informationdescribed herein with regard to the example IDU 22-1. Although thereference authentication data and encrypted contents sent and receivedby a respective user are stored in separate IDUs in the example SEcomputer system 134, a single IDU may alternatively store both thereference authentication data and the encrypted email contents of asingle user.

In order for the SE computer system 134 to support e-discovery, theSecure Email IDUs are not separate devices that can be physicallymanaged by respective users in different locations associated with eachrespective user. Rather, the Secure Email IDUs are physicallyconsolidated on one or more circuit boards 140 included in the hostedIDU platform 136. The circuit boards 140 constitute the hosted IDUplatform 136 which is managed by the organizational entity responsiblefor compliance with e-discovery regulations. Each IDU is still aseparate component within the system even though many IDUs are hosted ona single chip, circuit board, or physical device.

The Secure Email IDU of each user is not physically managed in alocation associated with and controlled by the respective user becausesuch an arrangement would not comply with the regulatory obligations fore-discovery. That is, any user who owns and manages his or her SecureEmail IDU could avoid having incriminating emails discovered by simplydestroying the emails on his or her Secure Email IDU. Thus, user-hostedSecure Email IDUs are not included in the computer system 134. Althoughone hosted IDU platform 136 managed by an organizational entity isincluded in the SE computer system 134, the SE computer system 134 mayalternatively include any number of hosted IDU platforms 136 each ofwhich may be in the same or different geographic location. The hostedIDU platforms 136 may be managed by the same or different organizationalentities. It should be understood that if the SE computer system 134 isnot used for e-discovery, the hosted IDU platform 136 need not beincluded in the SE computer system 134. Rather, Secure Email IDUs forsystem 134 could be implemented either using the hosted IDU platform 136or separate IDUs that are physically managed by respective users indifferent locations associated with each respective user, or somecombination of user managed and hosted IDUs.

The offline e-discovery server 14-O stores the encrypted logical address56 for the Secure Email IDU of each user, an encrypted alternativeaccess code 142 for the Secure Email IDU of each user, one or moreswitching addresses 144 of the Secure Email IDU for each user, anddecryption keys 146 for decrypting the secure email content 138 of theSecure Email IDU of each respective user stored in the hosted IDUplatform 136. Although the switching addresses 144 are not encrypted,the switching addresses 144 may alternatively be encrypted and thedecryption keys 146 may be stored on one or more different servers, forexample, the e-discovery search server 14-S.

The switching address 144 is intended to denote the information requiredby the manager of the hosted IDU platform 136 in order to switch aSecure Email IDU from using the access code 58 to the alternative accesscode 142. This may involve physically accessing the Secure Email IDU orelectronically addressing a specific circuit board 140 containingmultiple Secure Email IDUs using a dedicated network connection that isonly accessible from a computer within a data facility. An exampleswitching address 144 for manually accessing a Secure Email IDU to flipa physical switch may be rack 203, circuit board in slot 5 of the rack,switch number 105 on the circuit board. An example of an electronicswitching address 144, using IPv4 terminology, may be circuit boardswitching IP address 12.34.56.78.

Although the offline e-discovery server 14-O stores the encryptedlogical addresses 56 and encrypted alternative access codes 142, thee-discovery server 14-O is not a centralized target susceptible toremote cyber-attack by virtue of being offline and thus not hackablefrom a remote location. Additionally, by virtue of the offlinee-discovery server 14-O storing the encrypted alternative access codes142 instead of the encrypted access codes 58 for the Secure Email IDUs,the SE computer system 134 is less vulnerable to attacks against theoffline e-discovery server 14-O perpetuated by one or more individualsassociated with the organizational entity that manages the hosted IDUplatform 136. Specifically, stealing all the data on the offlinee-discovery server 14-O will not enable an external cyber-criminal tohack into Secure Email IDUs because the Secure Email IDUs typicallyoperate based on the access code 58 which is not stored on the offlinee-discovery server 14-O. In addition, much of the data stored on thee-discovery server 14-O is encrypted and would require compromisingmultiple additional devices in the SE computer system 136 to access userdata for more than a single user.

The dotted lines between the e-discovery search server 14-S and theoffline e-discovery server 14-O and the hosted IDU platform 136 areintended to indicate that a direct electronic connection may beestablished between the servers 14-S and 14-O, and between the server14-S and the hosted IDU platform 136. An electronic connection may bedesirable because the administrative convenience of such a connectionmay outweigh the additional security afforded by remaining completelyoffline. Such an electronic connection could also avoid using anyexternally accessible network connections by plugging directly into thecircuit boards of the hosted IDU platform 136. The electronic connectioncould be made only when needed so could be temporary, thus minimizingwindows of increased vulnerability. Alternatively, the connectionbetween the e-discovery search server 14-S and the offline e-discoveryserver 14-O may be an air gap which adds additional protection for thedata stored in the offline e-discovery server 14-O.

Alternative access codes 142 are useful only when a Secure Email IDU isswitched from using the access code 58 to the alternative access code142. The switch to using the alternative access code 142 is temporaryand requires physical access to the hosted IDU platform 136 as well asknowing the switching address 144 secured in the offline e-discoveryserver 14-O as well as the access code 58 stored on the computing device18 associated with a user.

An organizational entity responsible for e-discovery compliance managesthe offline e-discovery server 14-O and thus has control of a copy ofthe decryption keys 146 for secure email content 138 as well as theswitching addresses 144, encrypted alternative access codes 142, andencrypted logical addresses 56 of the Secure Email IDUs. This sameentity also manages the hosting of the Secure Email IDUs on the hostedIDU platform 136. Alternatively, the hosted IDU platform 136 could bemanaged by a different organizational entity or be in a differentgeographic location, albeit with some additional complications regardingany temporary electronic connections by the e-discovery search server14-S to switch to alternative access codes 142.

The e-discovery search server 14-S includes an application that causesthe e-discovery search server 14-S to conduct an e-discovery searchprocess and an application that causes the e-discovery search server14-S to obtain data from the offline e-discovery server 14-O whennecessary. This is necessary to account for cases in which a recipientdoes not comply with an e-discovery request to release the encryptedlogical address 56 and encrypted access code 58 for his or her SecureEmail IDU. For example, this could occur due to being on vacation andnot responding to emails during an e-discovery process. It could alsooccur if the recipient does not want his or her secure emails searchedduring an e-discovery process. The data for non-compliant recipientsobtained from the offline e-discovery server 14-O may be temporarilystored in the e-discovery search server 14-S.

The e-discovery search application enables the search server 14-S toaccept search parameters useful for defining the scope of an e-discoverysearch. Such search parameters include, but are not limited to, a listof specific users, dates, and keywords. Additionally, the search server14-S stores the decryption keys 148 for encrypted logical addresses 56of the Secure Email IDUs, the decryption keys 152 for the alternativeaccess codes 142 for the Secure Email IDUs, and the decryption keys 146for secure email content. The e-discovery search server 14-S isconfigured to securely communicate over the network 24

The servers 14-O, 14-S, and 14-E include subcomponents similar to thesubcomponents described herein for the additional server 14. The offlinee-discovery server 14-O, the e-discovery search server 14-S, and theemail server 14-E may alternatively be any type of computing device, forexample, a personal computer, capable of performing the functionsdescribed herein for these servers. The e-discovery search server 14-Smay alternatively be included within the email server 14-E, but is shownseparately as this enables strong protection of the data stored in theoffline e-discovery server 14-O while still allowing a direct electronicconnection with the offline e-discovery server 14-O.

The computing device 18 associated with each user stores the encryptedlogical address 56 and the encrypted access code 58 for the Secure EmailIDU of a respective user, as well as the computing device token 60 andkeys 62. The computing device 18 of each user also stores the decryptionkey 146 for that user's secure email content, and an encrypted logicaladdress 112 and an encrypted access code 114 for the authentication dataIDU of the user associated with the computing device 18. It should beappreciated that the encrypted logical addresses 56 and the decryptionkeys 146 are also stored in the offline e-discovery server 14-O.

The email server 14-E also performs all user verifications fornon-secure email functions. However, verification functions foraccessing secure email content are performed by the authenticationcomputer system 20. Separating the secure from the non-secure emailverification functions imposes the least impact on day-to-day use of thenon-secure email system while applying the highest security standardsfor secure emails. Alternatively, either the email server 14-E or theauthentication computer system 20 may conduct all verificationtransactions.

The email server 14-E also performs the functions of the POS computersystem 16 described in FIG. 1 . As a result, the POS computer system 16is not included in the SE computer system 134. The email server 14-Emanages all non-secure email content and includes a storage unit 14-NSE,or equivalent, for storing all non-secure emails, including coveremails. The internal subcomponents of the central user data server 12are not shown as they are the same as described herein with regard toFIG. 1 .

The email server 14-E may store data such as, but not limited to,decryption keys 148 for decrypting encrypted logical addresses 56 ofSecure Email IDUs included in the hosted IDU platform 136, decryptionkeys 150 for decrypting encrypted access codes 58 of Secure Email IDUsincluded in the hosted IDU platform 136, decryption keys 152 fordecrypting encrypted alternative access codes 142 of Secure Email IDUsincluded in the hosted IDU platform 136, keys 154 to validate tokensfrom other computer systems, encryption keys 156 for encrypting emailcontent 138 stored in the hosted IDU platform 136, and an email servertoken 158. The email server 14-E may also temporarily store encryptedsecure email content 138 as part of transmitting or buffering secureemails within the SE computer system 134.

FIG. 9 is a flowchart 160 illustrating an example method fortransmitting a secure email within the SE computer system 134. Themethod starts 162 after a sender initiates a secure email using his orher computing device 18 and is successfully verified as the result of averification transaction conducted by the authentication computer system20 as described herein with regard to FIG. 6 . Alternatively, the emailserver 14-E may perform the verification transaction or the identity ofthe user may be verified in any other manner.

After the authentication computer system 20 sends a successfulverification transaction result to the email server 14-E, the emailserver 14-E continues by requesting 164 the secure email contents fromthe computing device 18 of the sender, the encrypted logical address 56of the Secure Email IDU of the sender, and the encrypted access code 58of the Secure Email IDU of the sender. In response, the computing device18 of the sender continues by transmitting 166 the secure emailcontents, the encrypted logical address 56, and the encrypted accesscode 58 to the email server 14-E.

After receiving the requested information, the email server 14-Econtinues by encrypting 168 the secure email contents for each recipientof the secure email as well as the sender using the encryption key 156for each respective recipient and for the sender. The e-mail content isencrypted but the email addresses of the sender and recipients are not.The computing device 18 of the sender may collect additional informationthat is not encrypted and that is transmitted with the securelyencrypted email contents. For example, a non-secure email subject linecould be collected for display in the cover email displayed in the inboxof each recipient. Instead of a subject line that discloses sensitiveinformation, such as “Travel Plans with Vladimir Putin in Russia”, thenon-secure subject line might be “Travel Plans.” Alternatively, thesender and recipient email addresses may be encrypted albeit with someadditional steps required during e-discovery.

Additionally, after receiving the requested information, the emailserver 14-E continues by decrypting 170 the encrypted logical address 56and encrypted access code 58 of the sender and storing 170 the encryptedsecure email content in the Secure Email IDU of the sender. The emailserver 14-E also creates separate encrypted copies of the secure emailcontent for each recipient using the corresponding encryption key 156 ofeach respective recipient and temporarily stores the copies therein.

After storing 170 the secure email content, the email server 14-Econtinues by initiating 172 a non-secure cover email which includes thetransaction number, and transmitting 172 the non-secure cover email toeach intended recipient of the secure email. Doing so allows recipientsto monitor the inbox of a single email system and be alerted when secureemails are available to be read. Next, processing ends 174.

The encrypted copies of the secure email content for each recipient maybe temporarily stored in the email server 14-E until requested by arecipient. More specifically, when a recipient requests to read his orher copy of the secure email content, the email server 14-E requests theencrypted logical address 56 and encrypted access code 58 for the SecureEmail IDU of the requesting recipient from the computing device 18 ofthe requesting recipient. After receiving the requested information fromthe computing device 18, the email server 14-E continues by decrypting170 the received encrypted logical address 56 and encrypted access code58, and using the decrypted logical address 56 and access code 58 tostore 170 the copy of the secure encrypted email content in the SecureEmail IDU of the requesting recipient. Next, the email server 14-Epermanently deletes the temporary copy of the encrypted secure email forthe requesting recipient. Thus, it should be understood that therecipient copies are temporarily stored in the email server 14-E.

Instead of storing the copy of the secure encrypted email in the emailsever 14-E until the recipient attempts to read the secure email, theemail server 14-E may immediately store the encrypted email contents inthe Secure Email IDU of each recipient so long as there is a securemechanism by which the email server 14-E can securely obtain theencrypted logical address 56 and encrypted access code 58 of the SecureEmail IDU of each recipient. For example, the email server 14-E couldsend a text message or other notification to the computing device 18 ofa recipient notifying the recipient of an incoming secure email. Therecipient could then authorize release of his or her encrypted logicaladdress 56 and encrypted access code 58 to enable immediately storingthe secure email content in the Secure Email IDU of the recipient.

Although the example method of transmitting secure emails uses coveremails to notify recipients of received secure emails, any method ofnotifying recipients of secure emails may alternatively be used.

FIG. 10 is a flowchart 176 illustrating an example method for receivinga secure email within the SE computer system 134. The method starts 178when a recipient of a secure email attempts to access his or her emailinbox using his or her computing device 18. The computing device 18initiates a transaction with the email server 14-E to read the inbox,and the email server 14-E initiates a verification transaction. For eachverification transaction recipients are verified to the same securitylevel. However, in other example methods of receiving a secure email thelevel of verification may be tied to the security level of the email.The identity of the recipient may be verified using the method describedherein for the IDMS 108 or in any other manner.

After the recipient is successfully verified, the email server 14-Econtinues by transmitting 180 to the computing device 18 of therecipient a non-secure email inbox for display, the recipient selects182 an email to read from the displayed email inbox, and the computingdevice 18 continues by transmitting 182 the selection to the emailserver 14-E. In response, the email server 14-E continues by recognizingthe selection as a request to read a secure email and requesting 184from the computing device 18 of the recipient, the encrypted logicaladdress 56 and encrypted access code 58 for the Secure Email IDU of therecipient, as well as the decryption key 146 of the secure email contentof the recipient. Alternatively, the email server 14-E may request thedecryption key 146 before or after requesting the encrypted logicaladdress 56 and encrypted access code 58. Alternatively, the encryptedlogical address 56, the encrypted access code 58 for the Secure EmailIDU, and the decryption key 146 for the email contents may all be sentby the user computing device 18 at the same time as the selection of thesecure email to be read.

Next, the computing device 18 of the recipient continues by transmitting186 the encrypted logical address 56, encrypted access code 58, anddecryption key 146 to the email server 14-E. In response, the emailserver 14-E continues by decrypting 188 the encrypted logical address 56and encrypted access code 58 using the decryption keys 148, 150,respectively, obtaining 188 the transaction number from the cover email,and using the transaction number to identify the secure email contentscorresponding to the selection.

Next, the email server 14-E continues by deciding 190 whether or notthis is the first time the recipient requested to read the secure emailcontents of this specific email. If yes, the email server 14-E continuesby accessing 192 the temporary copy of the encrypted secure emailcontents 138 stored therein using the transaction number, and storing192 the encrypted email contents in the Secure Email IDU of therecipient using the decrypted logical address 56 and the decryptedaccess code 58 for the Secure Email IDU of the recipient. Next, theemail server 14-E continues by decrypting 194 the secure email contentsusing the decryption key 146 of the recipient and securely transmitting194 the decrypted secure email contents to the computing device 18 ofthe recipient. Alternatively, the email server 14-E may transmit theencrypted secure email contents to the computing device 18 of therecipient which decrypts the secure email contents.

Next, the computing device 18 continues by displaying 196 the secureemail contents for the recipient to see. After the recipient reads thesecure email content, the recipient causes the computing device 18 totransmit a message to the email sever 14-E indicating the secure emailcontents were read. In response, the email server 14-E continues bysecurely erasing 196 therefrom the temporary copy of the secure emailcontents. Next, processing ends 198.

If it is not the first time the recipient requested to read the secureemail contents 190, the email server 14-E continues by retrieving 200the encrypted secure email contents from the Secure Email IDU of therecipient using the transaction number with the decrypted logicaladdress 56 and decrypted access code 58. Next, processing continues byconducting operations 194 and 196 as described herein and processingends 198.

Some email systems are required to support e-discovery in the event oflitigation involving the organizational entity using the email system.

FIG. 11 is a flowchart 202 illustrating an example method for conductingan e-discovery search within the SE computer system 134. The methodstarts 204 with an e-discovery operator entering 206 e-discovery searchparameters into the e-discovery search server 14-S. The e-discoveryoperator is a person associated with the organizational entityresponsible for e-discovery. The e-discovery search parameters at leastidentify users included in the e-discovery search. After receiving theparameters, the e-discovery search server 14-S continues by securelytransmitting 206 an e-discovery directive to the computing device 18 ofeach user identified in the search parameters. The directive requestseach user to take actions that will facilitate e-discovery. At the timeof transmission 206, the e-discovery search server 14-S also establishes206 a period of time, referred to herein as a directive time, withinwhich each user has to comply with the directive. Each identified useris considered noncompliant until complying with the directive. Thedirective time may be any period of time judged to facilitate complyingwith the legal requirements of discovery. For example, the directivetime may range from five to ten days.

The directive is in the form of a secure email and instructs eachidentified user to release the encrypted logical address 56 andencrypted access code 58 for his or her Secure Email IDU, as well as thedecryption key 146 for his or her secure email content. Each identifieduser complies with the directive by verifying his or her identity whichmay be done using the method described herein with regard to the IDMS108 or in any other manner.

After successfully verifying his or her identity, the computing device18 of a respective identified user receives the secure directive emailand in response automatically releases and transmits the encryptedlogical address 56, the encrypted access code 58, and the decryption key146 in a secure email to the email server 14-E. The identified user mayalso be requested to take an explicit action before the encryptedlogical address 56, the encrypted access code 58, and the decryption key146 are released and transmitted. The encrypted logical address 56, theencrypted access code 58, and the decryption key 146 may alternativelybe transmitted in any manner, for example, as a direct transmissionbetween the computing device 18 of the identified user and thee-discovery search server 14-S. The directive may be authenticated inany other manner, for example, using Public Key Infrastructure (PKI)which supports signed transmissions that can be authenticated by therecipient.

Next, processing continues by deciding 208 whether or not the directivetime has expired. If not, processing continues by determining 210whether or not any secure emails have been received in response to thee-discovery directive. If not, the e-discovery search server 14-Scontinues by deciding 208 whether or not the directive time has expired.Otherwise, when secure email responses have been received 210, thee-discovery search server 14-S continues by requesting 212 from theemail server 14-E, for each received email, the encrypted logicaladdress 56, the encrypted access code 58, the decryption key 148 for theencrypted logical address 56, the decryption key 150 for the encryptedaccess code 58, and the encrypted secure email content.

After receiving the requested information from the email server 14-E,the e-discovery search server 14-S continues by accessing, decrypting,and scanning 214 the secure email contents of each identified user fromwhom a reply to the directive was received. Next, the e-discovery searchserver 14-S continues by storing 216 any scanned emails that satisfy thee-discovery search parameters and registering 216 the identified usersas compliant. A scanned email that satisfies the search parameters isreferred to herein as a hit. The e-discovery search processor 14-S alsosecurely erases 216 all the data for each identified user from whom areply was received, but the hits are not erased. The accessing,decrypting, scanning and erasing operations require little time so mostof the information is retained by the e-discovery search server 14-S foronly a short period of time, with only the hits retained until they areformatted and conveyed to the appropriate e-discovery manager.

Next, processing continues by deciding 208 whether or not the directivetime has expired. Identified users may not comply with the directivebefore the directive time expires for many different reasons such as,but not limited to, losing his or her computing device 18, being sick oron vacation from work, or willfully obstructing the e-discovery process.

When the directive time has expired 208, the e-discovery search server14-S continues processing by establishing 218 a temporary directelectronic connection with the hosted IDU platform 136 as well as theoffline e-discovery server 14-O, selecting 218 an identified user, anddetermining 220 whether or not the identified user is registered ascompliant. If the identified user is registered as compliant 220, thee-discovery search server 14-S continues by determining 222 whether ornot any more identified users need to be evaluated for compliance. Ifso, processing continues by selecting 224 another identified user anddetermining 220 whether or not the identified user is registered ascompliant.

When an identified user is not registered as compliant 220, thee-discovery search server 14-S continues by requesting 226 the switchingaddress 144 of the Secure Email IDU of the identified user from theoffline e-discovery server 14-O via the temporary electronic connection.Transferring the switching address 144 may alternatively be donemanually to avoid connecting the offline e-discovery server 14-O to anyother device. In response to the request, the offline e-discovery server14-O continues by transmitting the switching address 144 of theidentified user to the e-discovery search server 14-S.

After receiving the switching address 144, the e-discovery search server14-S continues by decrypting the encrypted logical address 56 andalternative access code 142 of the identified user, and electronicallyswitching 228 the Secure Email IDU of the identified user to use thedecrypted alternative access code of the identified user. Next, thee-discovery search server 14-S continues by accessing 230 the SecureEmail IDU of the identified user using the decrypted logical address 56,decrypted alternative access code, and decryption key 146 for secureemail content of the identified user. Next, the e-discovery searchserver 14-S continues by decrypting 230 the secure emails of theidentified user using the decryption key 146 of the identified user,scanning 230 the decrypted emails based on the e-discovery searchparameters, and storing 230 the hits. Instead of storing 230 the hitselectronically a printout may be generated that includes the hits.Alternatively, the hits may be put in any other form that an authorizedperson associated with the e-discovery would understand.

Next, processing continues by deciding 222 if there are any moreidentified users whose compliance was not evaluated at operation 220. Ifso, processing continues by selecting 224 another identified user anddetermining 220 whether or not the other identified user is registeredas compliant. However, when there are no more identified users 222 toevaluate for compliance, the e-discovery search processor 14-S continuesby creating 232 an e-discovery report based on the hits, destroying 234data temporarily stored as part of the e-discovery process, and severingthe temporary direct electronic connections with the offline e-discoveryserver 14-O and the hosted IDU platform 136. Next, processing ends 236.

In the example method of conducting an e-discovery search, the SecureEmail IDU of each non-compliant identified user reverts to the accesscode 58 after a single request has been processed using the respectivealternative access code 142. The alternative access code 142 can befactory installed in the IDU, or updateable as one of several optionalbasic functions the IDU is capable of performing. As an alternative toswitching access codes for a single transaction, the switch couldtemporarily disable the need for any access code or could enabletransferring the contents of a Secure Email IDU from the hosted IDUplatform 136 to a portable storage device that plugs into the hosted IDUplatform 136. Another alternative may require a facility operator (notshown) to manually switch the Secure Email IDU of an identifiednon-compliant identified user. Such an alternative eliminates the needfor the temporary direct electronic connections.

Although the e-discovery search server 14-S establishes a directelectronic connection with the hosted IUD platform 136 and the offlinee-discovery server 14-O to facilitate transferring the switching address144, the switching addresses 144 may alternatively be manuallytransferred to avoid connecting the offline e-discovery server 14-O toany other device or computer system.

The security of Secure Email IDUs stored in the hosted IDU platform 136during the example e-discovery search method is enhanced by thefollowing factors: a) the logical addresses 56 stored in the offlinee-discovery server 14-O are encrypted and the offline e-discovery server14-O does not store the access codes 58; b) The alternate access codes142 stored in the offline e-discovery server 14-O are encrypted. Also,switching a Secure Email IDU requires either physical access to thehosted IDU platform 136 or access to the temporary dedicated electronicconnection, both of which require physical access to a highly protecteddata center; c) Alternate access codes 142 are used briefly andtemporarily; and, d) E-discovery operations can be scheduled days inadvance which facilitates maintaining an exceptionally small group ofpeople with access to the e-discovery servers 14-O and 14-S. Thisminimizes the exposure to insider attacks. In addition, e-discoveryoperations could be implemented as two-person functions. That is,e-discovery operations could require two separate e-discovery managersto log in before gaining access to servers 14-S and 14-O.

The example method of conducting an e-discovery search maintains most ofthe security advantages of using IDUs while enabling organizations tocomply with e-discovery regulations even when some recipients may desireto conceal questionable or perhaps criminal activity by withholding therelease of the encrypted logical address 56 and access code 58 of his orher Secure Email IDU.

The example methods described herein may be conducted partly on thecentral user data server 12, any server included in the additionalserver 14, the POS computer system 16, the user computing device 18, theauthentication computer system 20, and on other computing devices (notshown) and other computer systems (not shown) operable to communicateover the network 24. Moreover, the example methods described herein maybe conducted entirely on the other computer systems (not shown) andother computing devices (not shown). Thus, it should be understood thatthe example methods may be conducted on many combinations of computers,computer systems (not shown), and computing devices (not shown).

The functions described herein as being performed by the central userdata server 12 may alternatively be performed by other components of thecomputer systems described herein. For example, any server included inthe additional server 14, the POS computer system 16, the user computingdevice 18, the authentication computer system 20, or other computersystems (not shown) and computing devices (not shown) may perform thefunctions described herein for the central user data server 12.Likewise, the functions described herein as being performed by the POScomputer system 16, the user computing device 18, the authenticationcomputer system 20, and any server included in the additional server 14may be performed by any other component of the computer systemsdescribed herein. However, the IDUs are not generally capable ofperforming the functions described herein for any other component so theIDUs cannot perform these functions. Conversely, the other generalpurpose components of the system are not capable of performing thefunctions of the IDU with the same levels of security. There arespecific functions, such as encryption of the logical address of an IDUand user data record 72 that could be delegated to IDUs to provideadditional security protections by minimizing the number of computingdevices that see this data in unencrypted form.

Data described herein as being managed by the central user data server12, any server included in the additional server 14, the POS computersystem 16, the user computing device 18, and the authentication computersystem 20 may alternatively be stored in other components of thecomputer systems described herein, including computer systems (notshown) and computing devices (not shown) operable to communicate withthe central user data server 12 over the network 24. Data may bepartially stored on different components of the computer systemsdescribed herein. For example, the encrypted access code 58 may bedivided into two encrypted files one of which is stored on the usercomputing device 18 and the other of which is stored on anothercomponent of a computer system described herein. Overall, the inclusionof at least one IDU per user in a computer system enables thedistribution of data and keys such that security of user data is greatlyenhanced. Although one or more specific distributions of data and keysthat enhance security are described herein, there are otherdistributions that achieve similar results. There are also alternativedistributions that offer different tradeoffs between added security,convenience, and other factors that are important in real worldimplementations.

Components as used herein is intended to refer to logically distinctcomputer devices that may be logical targets for cyber-criminals. Suchcomponents include, but are not limited to, the central user data server12, the server 14, POS computer systems 16, computing devices 18,authentication computer systems 20, and individual data units 22-1 to22-n including individual IDUs included within the hosted IDU platform136. The server 14 includes the e-discovery search server 14-S, theemail server 14-E, the storage unit 14-NSE, and the offline e-discoveryserver 14-O.

The example methods described herein may be implemented with manydifferent numbers and organizations of computer components andsubcomponent. Thus, the methods described herein are not limited tospecific computer-executable instructions. Alternative example methodsmay include different computer-executable instructions or componentshaving more or less functionality than described herein.

The example individual data unit described herein is a simple componentspecifically designed to perform a small number of functions. Such asimple design facilitates reducing design flaws of the individual dataunit and the complexity of software required to cause the individualdata unit to perform the functions. As a result, the individual dataunit is facilitated to be less vulnerable to successful cyber-attacksversus general purpose computers and computing devices which in turnfacilitates increasing the security of user data records stored in theindividual data unit.

As described herein, the individual data unit is not a general purposecomputer. However, as technology evolves, it might become possible toformally validate the designs and eliminate exploitable flaws inprogressively more complex devices. Thus, while the individual data unitis described herein as not being a general purpose computer with respectto today's state of the art, it is conceivable that future technologieswould allow an individual data unit to be built upon general purposecomputer technology while still retaining the necessary characteristicof being far less expensive and far less vulnerable to cyber-attacksthan the other components in the system.

One example computer system described herein includes a central userdata server, a server, a point of service computer system, a computingdevice, an authentication computer system, and a plurality of individualdata units that each store the data of one user in a respective datauser record. The data unit of each respective user may be located at andoperated from a geographic location associated with the respective user.Moreover, there may be a large number of users and associated individualdata units included in the computer system. As a result, the individualdata units, as well as the data stored therein, may be massivelydistributed. Such massive distribution to as many as millions ofdifferent locations is not practical without an IDU.

The components of the computer systems described herein securelycommunicate with each other over a network and the central user dataserver manages the data record of each user. By virtue of massivelydistributing the individual data units, the user data is decentralizedand thus constitutes a less attractive target for cyber-criminals than acentralized database containing the data of all users. Additionally, theindividual data units provide additional locations for storing data andkeys which increases the number of successful cyber-attacks needed tosteal any data stored in the computer system. As a result, security ofuser data as well as of the components of the computer system isfacilitated to be enhanced in a cost effective and reliable manner.

An example method for updating a user data record is also disclosed.More specifically, after a user initiates a network-based transactionwith his or her computing device, the computing device transmits to aPOS computer system the encrypted logical address and encrypted accesscode for each individual data unit associated with the user. The POScomputer system requests that an authentication computer system verifythe identity of the user. Verification of the user implicitly authorizesthe requesting user to conduct the network-based transaction. When theidentity of the user is verified, the POS computer system retrieves theuser data and conducts the network-based transaction. When the userchanged any information stored in his or her user data record or if thenetwork-based transaction included additional information that should bestored in the data record of the user, the data record of the user isupdated.

When the user data record is to be updated, the POS computer systemupdates the data record of the user and requests that the updated userrecord be encrypted and stored. The central user data server encryptsthe user data record and arranges to store the updated data record onthe IDU associated with the user. As a result, the security of user datarecords is facilitated to be enhanced, and the time and costs associatedwith updating user data records are facilitated to be reduced.

An example method for authenticating a user is also disclosed. Morespecifically, in response to receiving a transaction request from thecomputing device of a user, an external computer system requests theauthentication computer system to verify the identity of the user. Theauthentication computer system sends a capture request to the computingdevice of the user. In response, the computing device of the userprompts the user to capture live authentication data of his or her selfwhich is transmitted to the authentication computer system with otherinformation. The authentication computer system transmits the capturedlive authentication data and other information to the central user dataserver which obtains reference authentication data from the IDU of theuser. After validating the reference authentication data, the centraluser data server transmits the captured live authentication data andreference authentication data to the authentication computer systemwhich conducts a verification transaction based on the received data. Asa result, accuracy and trustworthiness of authentication transactionresults are facilitated to be enhanced, and the time and costsassociated with conducting verification transactions are facilitated tobe reduced.

An example method for transmitting a secure email is also disclosed.More specifically, a sender who initiates a secure email is successfullyverified and the successful verification result is sent to an emailserver which requests secure email contents from the computing device ofthe sender and other information. In response, the computing device ofthe sender transmits the requested information to the email server. Theemail server decrypts the information and arranges to store the secureemail contents in the Secure Email IDU of the sender. The email serveralso creates encrypted copies of the secure email content for each emailrecipient, initiates a non-secure cover email, and transmits thenon-secure email to each intended recipient of the secure email. As aresult, the security of secure emails is facilitated to be enhanced in acost effective and reliable manner.

A method of receiving a secure email is also disclosed. Morespecifically, when a recipient of a secure email attempts to access hisor her email inbox using his or her computing device, the computingdevice initiates a transaction with the email server to read the inbox,and the email server initiates a verification transaction. After therecipient is successfully verified, the email server continues bytransmitting to the computing device of the recipient a non-secure emailinbox for display. The recipient selects an email to read from thedisplayed email inbox, and the computing device transmits the selectionto the email server. The email server obtains a transaction number froma cover email and uses the transaction number to identify the secureemail contents corresponding to the selection.

If it is the first time the recipient requested to read the email, theemail server accesses a temporary copy of the secure email contentsstored therein using the transaction number and stores the encryptedemail contents in the Secure Email IDU of the recipient. If it is notthe first time, the email server retrieves the encrypted email contentsfrom the Secure Email IDU of the recipient using the transaction number,and the email server securely transmits the secure email content to thecomputing device of the recipient. As a result, the security of emailcontent is enhanced in a cost effective and reliable manner.

A method for conducting e-discovery is also disclosed. Morespecifically, after e-discovery search parameters are entered into ane-discovery search server, the e-discovery search server securelytransmits an e-discovery directive to the computing device of each useridentified in the search parameters. Responding to this directivereleases the encrypted logical address and encrypted access code forthat user's IDU where secure email content is stored. If the directivehas not expired and secure email responses have been received inresponse to the directive, the e-discovery search server requests fromthe email server, for each received email, the encrypted secure emailcontent. After receiving the requested information from the emailserver, the e-discovery search server accesses, decrypts, and scans thesecure email contents of each identified user from whom a reply to thedirective was received. Next, the e-discovery search server stores anyscanned emails that satisfy the e-discovery search parameters andregisters the identified users as compliant.

When the directive time has expired, the e-discovery search serverestablishes a temporary direct electronic connection with the hosted IUDplatform as well as with the offline e-discovery server, selects anidentified user, and determines whether or not the identified user isregistered as compliant. When an identified user is not registered ascompliant, the e-discovery search server continues by requesting theswitching address of the Secure Email IDU of the identified user fromthe offline e-discovery server 14-O via the temporary electronicconnection.

After receiving the switching address, the e-discovery search servercontinues by electronically switching the Secure Email IDU of theidentified user to use the alternative access code of the identifieduser. Next, the e-discovery search server continues by accessing theSecure Email IDU of the identified user using the encrypted logicaladdress, alternative access code, and decryption key for secure emailcontent of the identified user.

When there are no more identified users to evaluate for compliance, thee-discovery search server continues by creating an e-discovery reportbased on the hits, destroying data temporarily stored as part of thee-discovery process, and severing the temporary direct electronicconnections with the offline e-discovery server and the hosted IDUplatform. As a result, an e-discovery process is made practical evenwhile retaining most of the improved security enabled by distributingsecure email contents and decryption keys for those contents to separateIDUs for each user.

The example methods described above should not be considered to imply afixed order for performing the method steps. Rather, the method stepsmay be performed in any order that is practicable, includingsimultaneous performance of at least some steps. Moreover, the methodsteps may be performed in real time or in near real time. It should beunderstood that, for any process described herein, there can beadditional, fewer, or alternative steps performed in similar oralternative orders, or in parallel, within the scope of the variousembodiments, unless otherwise stated. Furthermore, the invention is notlimited to the embodiments of the methods, systems and apparatusdescribed above in detail. Rather, other variations of the methods,systems, and apparatus may be utilized within the spirit and scope ofthe claims.

What is claimed is:
 1. A computer system for enhancing the security ofuser email contents and enabling electronic discovery comprising: aplurality of individual data units, wherein each individual data unit(IDU) is for a respective user and stores secure email contents for therespective user; at least one computing device for conductingnetwork-based transactions being associated with each respective user,wherein the at least one computing device stores an encrypted logicaladdress required to access the IDU of the respective user, the encryptedlogical address being different for each IDU; and a computer configuredas an email server, wherein the email server stores decryption keys forthe encrypted logical addresses and manages non-secure email contents aswell as secure email contents stored on IDUs, wherein the IDUs, the atleast one computing device, and the email server communicate securelyover a network.
 2. A computer system for enhancing the security of useremail contents and enabling electronic discovery in accordance withclaim 1 further comprising at least one hosted IDU platform forimplementing each IDU used for storing secure email contents of arespective user, the at least one hosted IDU platform being in a same ordifferent location.
 3. A computer system for enhancing the security ofuser email contents and enabling electronic discovery in accordance withclaim 2, further comprising a computer configured as a server, wherein:the at least one computing device stores at least one access code andreceives a directive instructing the user of the at least one computingdevice to release the access code for accessing the secure emailcontents stored in the IDU for the user of the at least one computingdevice; the at least one computing device releases and transmits via thenetwork the access code in response to user input; and the serverreceives via the network the access code and accesses the secure emailcontents using the access code.
 4. A computer system for enhancing thesecurity of user email contents and enabling electronic discovery inaccordance with claim 2 further comprising a computer configured as aserver, wherein the server receives an alternative access code when anaccess code is unavailable and accesses the secure email contents storedin one of the IDUs using the alternative access code.
 5. A computersystem for enhancing the security of user email contents and enablingelectronic discovery in accordance with claim 2, further comprising acomputer configured as a server which stores alternative access codesand communicates via the network temporarily when the one IDU isswitched from using an access code to using an alternative access code,wherein each alternative access code is different and corresponds to oneof the IDUs.
 6. A computer system for enhancing the security of useremail contents and enabling electronic discovery in accordance withclaim 1 further comprising: a computer configured as a server, whereinthe server stores alternative access codes and switch addresses, andtransmits the alternative access codes and switch addresses via thenetwork; and a second computer configured as a server, wherein thesecond server receives the alternative access code and switching addressfor one of the IDUs, and electronically switches the IDU to use thealternative access code to access the secure email contents storedtherein.
 7. A computer system for enhancing the security of user emailcontents and enabling electronic discovery in accordance with claim 1,further comprising at least one Point of Service computer system,wherein: each user uses multiple IDUs, the email content for each useris stored in the computer components of the computer system such thatthe email content of any user using M IDUs is safe against acyber-attack that successfully compromises M of the components, where Mis the number of IDUs used by the at least one user, the email contentsof a user can be compromised when at least M+1 of the components aresuccessfully compromised as the result of a cyber-attack, and the emailcontents of N users, each user using M-IDUs is compromised when at least(M×N)+1 of the components are successfully compromised as the result ofa cyber-attack, where N is the number of users.
 8. A computer system forenhancing the security of user email contents and enabling electronicdiscovery in accordance with claim 1, wherein each IDU stores encryptionand decryption keys for the email contents stored therein.
 9. A computersystem for enhancing the security of user email contents and enablingelectronic discovery in accordance with claim 1, wherein: the at leastone computer stores an encrypted access code for accessing the emailcontents stored in the IDU for the user of the least one computingdevice; and the IDU corresponding to the at least one computing deviceof the user stores a decryption key for the encrypted access code.
 10. Amethod for enhancing the security of email contents and enablingelectronic discovery comprising: storing secure email contents for usersin individual data units, the email contents of each user being storedin a respective individual data unit (IDU); storing an encrypted logicaladdress in each of a plurality of computing devices, wherein eachcomputing device is associated with a respective user, each encryptedlogical address is required to access the IDU of the respective user,and the encrypted logical address for each IDU is different; storing adecryption key for each encrypted logical address and non-secure emailcontents in an email server; and managing, using the email server, thenon-secure and secure email contents.
 11. A method for enhancing thesecurity of email contents and enabling electronic discovery inaccordance with claim 10 further comprising implementing the IDUs on atleast one hosted IDU platform, wherein the at least one hosted IDUplatform is in a same or different location.
 12. A method for enhancingthe security of email contents and enabling electronic discovery inaccordance with claim 11 further comprising: receiving, by at least oneof the computing devices, a directive instructing a user of the at leastone computing device to release an access code stored therein foraccessing the secure email contents stored in the IDU for the user ofthe at least one computing device; releasing, by the at least onecomputing device, the access code and transmitting the access code to acomputer configured as a server; and receiving, by the server, theaccess code; and accessing, using the server, the secure email contentsusing the access code.
 13. A method for enhancing the security of emailcontents and enabling electronic discovery in accordance with claim 11further comprising: receiving, by a computer configured as a server, analternative access code when an access code is unavailable; accessing,using the server, the secure email contents stored in one of the IDUsusing the alternative access code.
 14. A method for enhancing thesecurity of email contents and enabling electronic discovery inaccordance with claim 11 further comprising: storing alternative accesscodes in a computer configured as a server, each alternative access codebeing different and corresponding to one of the IDUs; and temporarilycommunicating via a network, using the server, when the one IDU isswitched from using an access code to using an alternative access code.15. A method for enhancing the security of email contents and enablingelectronic discovery in accordance with claim 11 further comprising:storing alternative access codes and switch addresses in a computerconfigured as a server; transmitting, using a network, the alternativeaccess code and switching address for one of the IDUs to a secondcomputer configured as a server; receiving, by the second server, thealternative access code and switching address; electronically switching,by the second server, the IDU to use the alternative access code toaccess the secure email contents stored therein.
 16. A method forenhancing the security of email contents and enabling electronicdiscovery in accordance with claim 10 further comprising storing in eachIDU encryption and decryption keys for the email contents storedtherein.
 17. A method for enhancing the security of email contents andenabling electronic discovery in accordance with claim 10 furthercomprising: storing in the at least one computer an encrypted accesscode for accessing the email contents stored in the IDU for the user ofthe least one computing device; and storing a decryption key for theencrypted access code in the IDU corresponding to the at least onecomputing device of the user.
 18. A method for enhancing the security ofuser email contents comprising: storing encrypted email contents ofusers on electronic devices, wherein each electronic device stores theencrypted email contents of a respective user, each user is associatedwith at least one electronic device, and each electronic device has aunique logical address and a unique secret access code; encrypting,using a central computer, the unique logical address and the uniquesecret access code for each electronic device, wherein the secret accesscode is required to access the email content stored in a respectiveelectronic device and is different for each respective electronicdevice; transmitting the encrypted logical address and the encryptedaccess code for at least one electronic device associated with a user toa computing device associated with the user; storing the encryptedlogical address and the encrypted access code on the computing deviceassociated with the user; and storing on the central computer,decryption keys for the encrypted logical addresses, encrypted secretaccess codes, and encrypted user email contents.